Login
- Table of Contents
-
- 16-Security Command Reference
- 00-Preface
- 01-ACL commands
- 02-Time range commands
- 03-User profile commands
- 04-Password control commands
- 05-Public key management commands
- 06-PKI commands
- 07-IPsec commands
- 08-IKE commands
- 09-IKEv2 commands
- 10-SSH commands
- 11-SSL commands
- 12-SSL VPN commands
- 13-Session management commands
- 14-Connection limit commands
- 15-Attack detection and prevention commands
- 16-IP-based attack prevention commands
- 17-IP source guard commands
- 18-ARP attack protection commands
- 19-ND attack defense commands
- 20-Protocol packet rate limit commands
- 21-Object group commands
- Related Documents
-
| Title | Size | Download |
|---|---|---|
| 15-Attack detection and prevention commands | 387.29 KB |
Attack detection and prevention commands
attack-defense local apply policy
attack-defense login reauthentication-delay
attack-defense signature log non-aggregate
attack-defense tcp fragment enable
display attack-defense flood statistics ip
display attack-defense flood statistics ipv6
display attack-defense policy ip
display attack-defense policy ipv6
display attack-defense scan attacker ip
display attack-defense scan attacker ipv6
display attack-defense statistics interface
display attack-defense statistics local
display blacklist destination-ip
display blacklist destination-ipv6
http-flood detect non-specific
icmp-flood detect non-specific
icmpv6-flood detect non-specific
reset attack-defense policy flood
reset attack-defense statistics interface
reset attack-defense statistics local
reset blacklist destination-ip
reset blacklist destination-ipv6
signature { large-icmp | large-icmpv6 } max-length
syn-ack-flood detect non-specific
Attack detection and prevention commands
ack-flood action
Use ack-flood action to specify global actions against ACK flood attacks.
Use undo ack-flood action to restore the default.
Syntax
ack-flood action { drop | logging } *
undo ack-flood action
Default
No global action is specified for ACK flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent ACK packets destined for the victim IP addresses.
logging: Enables logging for ACK flood attack events. The log messages will be sent to the log system.
Examples
# Specify drop as the global action against ACK flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] ack-flood action drop
Related commands
ack-flood detect
ack-flood detect non-specific
ack-flood threshold
ack-flood detect
Use ack-flood detect to configure IP address-specific ACK flood attack detection.
Use undo ack-flood detect to remove IP address-specific ACK flood attack detection configuration.
Syntax
ack-flood detect { ip ipv4-address | ipv6 ipv6-address } [ threshold threshold-value ] [ action { { drop | logging } * | none } ]
undo ack-flood detect { ip ipv4-address | ipv6 ipv6-address }
Default
IP address-specific ACK flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ip ipv4-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be 255.255.255.255 or 0.0.0.0.
ipv6 ipv6-address: Specifies the IPv6 address to be protected.
threshold threshold-value: Specifies the threshold for triggering ACK flood attack prevention. The value range is 1 to 1000000 in units of ACK packets sent to the specified IP address per second.
action: Specifies the actions when an ACK flood attack is detected. If no action is specified, the global actions set by the ack-flood action command apply.
drop: Drops subsequent ACK packets destined for the protected IP address.
logging: Enables logging for ACK flood attack events.
none: Takes no action.
Usage guidelines
With ACK flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of ACK packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure ACK flood attack detection for multiple IP addresses in one attack defense policy.
Examples
# Configure ACK flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] ack-flood detect ip 192.168.1.2 threshold 2000
Related commands
ack-flood action
ack-flood detect non-specific
ack-flood threshold
ack-flood detect non-specific
Use ack-flood detect non-specific to enable global ACK flood attack detection.
Use undo ack-flood detect non-specific to disable global ACK flood attack detection.
Syntax
ack-flood detect non-specific
undo ack-flood detect non-specific
Default
Global ACK flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global ACK flood attack detection applies to all IP addresses except those specified by the ack-flood detect command. The global detection uses the global trigger threshold set by the ack-flood threshold command and global actions specified by the ack-flood action command.
Examples
# Enable global ACK flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] ack-flood detect non-specific
Related commands
ack-flood action
ack-flood detect
ack-flood threshold
ack-flood threshold
Use ack-flood threshold to set the global threshold for triggering ACK flood attack prevention.
Use undo ack-flood threshold to restore the default.
Syntax
ack-flood threshold threshold-value
undo ack-flood threshold
Default
The global threshold is 1000 for triggering ACK flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of ACK packets sent to an IP address per second.
Usage guidelines
With global ACK flood attack detection configured, the device is in attack detection state. When the sending rate of ACK packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global ACK flood attack detection. Adjust the threshold according to the application scenarios. If the number of ACK packets sent to a protected server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering ACK flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] ack-flood threshold 100
Related commands
ack-flood action
ack-flood detect
ack-flood detect non-specific
attack-defense apply policy
Use attack-defense apply policy to apply an attack defense policy to an interface.
Use undo attack-defense apply policy to restore the default.
Syntax
attack-defense apply policy policy-name
undo attack-defense apply policy
Default
No attack defense policy is applied to an interface.
Views
Interface view
Predefined user roles
network-admin
Parameters
policy-name: Specifies an attack defense policy by its name. The policy name is a case-insensitive string of 1 to 31 characters. Valid characters include uppercase and lowercase letters, digits, underscores (_), and hyphens (-).
Usage guidelines
An interface can have only one attack defense policy applied. If you execute this command multiple times, the most recent configuration takes effect.
An attack defense policy can be applied to multiple interfaces.
Examples
# Apply attack defense policy atk-policy-1 to GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] attack-defense apply policy atk-policy-1
Related commands
attack-defense policy
display attack-defense policy
attack-defense local apply policy
Use attack-defense local apply policy to apply an attack defense policy to the device.
Use undo attack-defense local apply policy to restore the default.
Syntax
attack-defense local apply policy policy-name
undo attack-defense local apply policy
Default
No attack defense policy is applied to the device.
Views
System view
Predefined user roles
network-admin
Parameters
policy-name: Specifies an attack defense policy by its name. The policy name is a case-insensitive string of 1 to 31 characters. Valid characters include uppercase and lowercase letters, digits, underscores (_), and hyphens (-).
Usage guidelines
An attack defense policy applied to the device itself detects packets destined for the device and prevents attacks targeted at the device.
Applying an attack defense policy to the device can improve the efficiency of processing attack packets destined for the device.
Each device can have only one attack defense policy applied. If you execute this command multiple times, the most recent configuration takes effect.
An attack defense policy can be applied to the device itself and to multiple interfaces.
If a device and its interfaces have attack defense policies applied, a packet destined for the device is processed as follows:
1. The policy applied to the receiving interface processes the packet.
2. If the packet is not dropped by the receiving interface, the policy applied to the device processes the packet.
Examples
# Apply attack defense policy atk-policy-1 to the device.
<Sysname> system-view
[Sysname] attack-defense local apply policy atk-policy-1
Related commands
attack-defense policy
display attack-defense policy
attack-defense login reauthentication-delay
Use attack-defense login reauthentication-delay to enable the login delay feature.
Use undo attack-defense login reauthentication-delay to restore the default.
Syntax
attack-defense login reauthentication-delay seconds
undo attack-defense login reauthentication-delay
Default
The login delay feature is disabled. The device does not delay accepting a login request from a user who has failed a login attempt.
Views
System view
Predefined user roles
network-admin
Parameters
seconds: Specifies the delay period in seconds, in the range of 4 to 60.
Usage guidelines
The login delay feature delays the device to accept a login request from a user after the user fails a login attempt. This feature can slow down login dictionary attacks.
Examples
# Enable the login delay feature and set the delay period to 5 seconds.
[Sysname] attack-defense login reauthentication-delay 5
attack-defense policy
Use attack-defense policy to create an attack defense policy and enter its view, or enter the view of an existing attack defense policy.
Use undo attack-defense policy to delete an attack defense policy.
Syntax
attack-defense policy policy-name
undo attack-defense policy policy-name
Default
No attack defense policies exist.
Views
System view
Predefined user roles
network-admin
Parameters
policy-name: Assigns a name to the attack defense policy. The policy name is a case-insensitive string of 1 to 31 characters. Valid characters include uppercase and lowercase letters, digits, underscores (_), and hyphens (-).
Usage Guidelines
|
|
CAUTION: The default thresholds for triggering attack prevention might not be appropriate for your network. Set appropriate thresholds according to the actual application scenarios. Small thresholds might affect the Internet or webpage access speed. Large thresholds might make your network vulnerable to attacks. |
Examples
# Create attack defense policy atk-policy-1 and enter its view.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1]
Related commands
attack-defense apply policy
display attack-defense policy
attack-defense signature log non-aggregate
Use attack-defense signature log non-aggregate to enable log non-aggregation for single-packet attack events.
Use undo attack-defense signature log non-aggregate to restore the default.
Syntax
attack-defense signature log non-aggregate
undo attack-defense signature log non-aggregate
Default
Log non-aggregation is disabled for single-packet attack events.
Views
System view
Predefined user roles
network-admin
Usage guidelines
Log aggregation aggregates multiple logs generated during a period of time and sends one log. Logs that are aggregated must have the following attributes in common:
· Location where the attacks are detected: device or interface.
· Attack type.
· Attack prevention action.
· Source and destination IP addresses.
As a best practice, do not disable log aggregation. A large number of logs will consume the display resources of the console.
Examples
# Enable log non-aggregation for single-packet attack events.
<Sysname> system-view
[Sysname] attack-defense signature log non-aggregate
Related commands
signature detect
attack-defense tcp fragment enable
Use attack-defense tcp fragment enable to enable TCP fragment attack prevention.
Use undo attack-defense tcp fragment enable to disable TCP fragment attack prevention.
Syntax
attack-defense tcp fragment enable
undo attack-defense tcp fragment enable
Default
TCP fragment attack prevention is enabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
This command enables the device to drop attack TCP fragments to prevent TCP fragment attacks that the packet filter cannot detect. As defined in RFC 1858, attack TCP fragments refer to the following TCP fragments:
· First fragments in which the TCP header is smaller than 20 bytes.
· Non-first fragments with a fragment offset of 8 bytes (FO=1).
TCP fragment attack prevention takes precedence over single-packet attack prevention. When both are used, incoming TCP packets are processed first by TCP fragment attack prevention and then by the single-packet attack defense policy.
Examples
# Enable TCP fragment attack prevention.
<Sysname> System-view
[Sysname] attack-defense tcp fragment enable
blacklist destination-ip
Use blacklist destination-ip to add a destination IPv4 blacklist entry.
Use undo blacklist destination-ip to delete a destination IPv4 blacklist entry.
Syntax
blacklist destination-ip destination-ip-address [ timeout minutes ]
undo blacklist destination-ip destination-ip-address
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Default
No destination IPv4 blacklist entries exist.
Views
System view
Predefined user roles
network-admin
Parameters
destination-ip-address: Specifies an IPv4 address for the destination blacklist entry. Packets destined for this address will be dropped.
timeout minutes: Specifies the aging time for the destination blacklist entry, in the range of 1 to 10080 minutes. If you do not specify this option, the blacklist entry never ages out. You must delete it manually.
Usage guidelines
The undo blacklist destination-ip command deletes only manually added destination IPv4 blacklist entries. To delete dynamically added destination IPv4 blacklist entries, use the reset blacklist destination-ip command.
A destination blacklist entry with an aging time is not saved to the configuration file and cannot survive a reboot.
You can use the display blacklist destination-ip command to display all effective destination IPv4 blacklist entries.
Examples
# Add a destination blacklist entry for IPv4 address 192.168.1.2 and set the aging time to 20 minutes for the entry.
<Sysname> system-view
[Sysname] blacklist ip 192.168.1.2 timeout 20
Related commands
blacklist global enable
display blacklist destination-ip
blacklist destination-ipv6
Use blacklist destination-ipv6 to add a destination IPv6 blacklist entry.
Use undo blacklist destination-ipv6 to delete a destination IPv6 blacklist entry.
Syntax
blacklist destination-ipv6 destination-ipv6-address [ timeout minutes ]
undo blacklist destination-ipv6 destination-ipv6-address
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Default
No destination IPv6 blacklist entries exist.
Views
System view
Predefined user roles
network-admin
Parameters
destination-ipv6-address: Specifies an IPv6 address for the blacklist entry. Packets destined for this address will be dropped.
timeout minutes: Specifies the aging time for the blacklist entry, in the range of 1 to 10080 minutes. If you do not specify this option, the blacklist entry never ages out. You must delete it manually.
Usage guidelines
The undo blacklist destination-ipv6 command deletes only manually added destination IPv6 blacklist entries. To delete dynamically added destination IPv6 blacklist entries, use the reset blacklist ipv6 command.
A destination blacklist entry with an aging time is not saved to the configuration file and cannot survive a reboot.
You can use the display blacklist destination-ipv6 command to display all effective destination IPv6 blacklist entries.
Examples
# Add a destination blacklist entry for IPv6 address 2012::12:25 and set the aging time to 10 minutes for the entry.
<Sysname> system-view
[Sysname] blacklist ipv6 2012::12:25 timeout 10
Related commands
blacklist global enable
blacklist destination-ipv6
blacklist global enable
Use blacklist global enable to enable the global blacklist feature.
Use undo blacklist global enable to disable the global blacklist feature.
Syntax
blacklist global enable
undo blacklist global enable
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Default
The global blacklist feature is disabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
If you enable the global blacklist feature, the blacklist feature is enabled on all interfaces.
Examples
# Enable the global blacklist feature.
<Sysname> system-view
[Sysname] blacklist global enable
Related commands
blacklist ip
blacklist ip
Use blacklist ip to add a source IPv4 blacklist entry.
Use undo blacklist ip to delete a source IPv4 blacklist entry.
Syntax
blacklist ip source-ip-address [ timeout minutes ]
undo blacklist ip source-ip-address
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Default
No source IPv4 blacklist entries exist.
Views
System view
Predefined user roles
network-admin
Parameters
source-ip-address: Specifies an IPv4 address for the source blacklist entry. Packets sourced from this address will be dropped.
timeout minutes: Specifies the aging time in minutes for the source blacklist entry, in the range of 1 to 10080. If you do not specify this option, the blacklist entry never ages out. You must delete it manually.
Usage guidelines
The undo blacklist ip command deletes only manually added source IPv4 blacklist entries. To delete dynamically added source IPv4 blacklist entries, use the reset blacklist ip command.
A source blacklist entry with an aging time is not saved to the configuration file and cannot survive a reboot.
You can use the display blacklist ip command to display all effective source IPv4 blacklist entries.
Examples
# Add a source blacklist entry for IPv4 address 192.168.1.2 and set the aging time to 20 minutes for the entry.
<Sysname> system-view
[Sysname] blacklist ip 192.168.1.2 timeout 20
Related commands
blacklist global enable
display blacklist ip
blacklist ipv6
Use blacklist ipv6 to add a source IPv6 blacklist entry.
Use undo blacklist ipv6 to delete a source IPv6 blacklist entry.
Syntax
blacklist ipv6 source-ipv6-address [ timeout minutes ]
undo blacklist ipv6 source-ipv6-address
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Default
No source IPv6 blacklist entries exist.
Views
System view
Predefined user roles
network-admin
Parameters
source-ipv6-address: Specifies an IPv6 address for the source blacklist entry. Packets sourced from this address will be dropped.
timeout minutes: Specifies the aging time in minutes for the source blacklist entry, in the range of 1 to 10080. If you do not specify this option, the blacklist entry never ages out. You must delete it manually.
Usage guidelines
The undo blacklist ipv6 command deletes only manually added source IPv6 blacklist entries. To delete dynamically added source IPv6 blacklist entries, use the reset blacklist ipv6 command.
A source blacklist entry with an aging time is not saved to the configuration file and cannot survive a reboot.
You can use the display blacklist ipv6 command to display all effective source IPv6 blacklist entries.
Examples
# Add a source blacklist entry for IPv6 address 2012::12:25 and set the aging time to 10 minutes for the entry.
<Sysname> system-view
[Sysname] blacklist ipv6 2012::12:25 timeout 10
Related commands
blacklist global enable
blacklist ip
blacklist logging enable
Use blacklist logging enable to enable logging for the blacklist feature.
Use undo blacklist logging enable to disable logging for the blacklist feature.
Syntax
blacklist logging enable
undo blacklist logging enable
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Default
Logging is disabled for the blacklist feature.
Views
System view
Predefined user roles
network-admin
Usage guidelines
With logging enabled for the blacklist feature, the system outputs logs in the following situations:
· A blacklist entry is manually added.
· A blacklist entry is dynamically added by the scanning attack detection feature.
· A blacklist entry is manually deleted.
· A blacklist entry ages out.
A blacklist log records the following information:
· Source IP address of the blacklist entry.
· Reason for adding or deleting the blacklist entry.
· Aging time for the blacklist entry.
The blacklist logs cannot be output to the console or the monitor terminal. To view blacklist logs stored on the device, use the display logbuffer command. For more information about the display logbuffer command, see information center commands in System Management Command Reference.
Examples
# Enable logging for the blacklist feature.
<Sysname> system-view
[Sysname] blacklist logging enable
# Add 192.168.100.12 to the blacklist. A log is output for the adding event.
[Sysname] blacklist ip 192.168.100.12
%Mar 13 03:47:49:736 2013 Sysname BLS/5/BLS_ENTRY_ADD:SrcIPAddr(1003)=192.168.100.12; DSLiteTunnelPeer(1040)=--; RcvVPNInstance(1041)=--; TTL(1051)=; Reason(1052)=Configuration.
# Delete 192.168.100.12 from the blacklist. A log is output for the deletion event.
[Sysname] undo blacklist ip 192.168.100.12
%Mar 13 03:49:52:737 2013 Sysname BLS/5/BLS_ENTRY_DEL:SrcIPAddr(1003)=192.168.100.12; DSLiteTunnelPeer(1040)=--; RcvVPNInstance(1041)=--; Reason(1052)=Configuration.
Related commands
blacklist ip
blacklist ipv6
display attack-defense flood statistics ip
Use display attack-defense flood statistics ip to display IPv4 flood attack detection and prevention statistics.
Syntax
display attack-defense { ack-flood | dns-flood | fin-flood | flood | http-flood | icmp-flood | rst-flood | syn-ack-flood | syn-flood | udp-flood } statistics ip [ ip-address ] [ interface interface-type interface-number | local ] [ count ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
ack-flood: Specifies ACK flood attack.
dns-flood: Specifies DNS flood attack.
fin-flood: Specifies FIN flood attack.
flood: Specifies all IPv4 flood attacks.
http-flood: Specifies HTTP flood attack.
icmp-flood: Specifies ICMP flood attack.
rst-flood: Specifies RST flood attack.
syn-ack-flood: Specifies SYN-ACK flood attack.
syn-flood: Specifies SYN flood attack.
udp-flood: Specifies UDP flood attack.
ip-address: Specifies a protected IPv4 address. If you do not specify an IPv4 address, this command displays flood attack detection and prevention statistics for all protected IPv4 addresses.
interface interface-type interface-number: Specifies an interface by its type and number.
local: Specifies the device.
count: Displays the number of matching protected IPv4 addresses.
Usage guidelines
The device collects statistics about protected IP addresses for flood attack detection and prevention. The attackers' IP addresses are not recorded.
If you do not specify the interface or local parameter, this command displays IPv4 flood attack detection and prevention statistics for all interfaces and the device.
Examples
# Display all IPv4 flood attack detection and prevention statistics.
<Sysname> display attack-defense flood statistics ip
IP address VPN Detected on Detect type State PPS Dropped
201.55.7.45 -- GE1/0/2 SYN-ACK-FLOOD Normal 1000 111111111
192.168.11.5 -- GE1/0/3 ACK-FLOOD Normal 1000 222222222
201.55.7.44 -- Local DNS-FLOOD Normal 1000 111111111
192.168.11.4 -- Local ACK-FLOOD Normal 1000 22222222
# Display the number of IPv4 addresses that are protected against flood attacks.
<Sysname> display attack-defense flood statistics ip count
Totally 2 flood entries.
Table 1 Command output
|
Field |
Description |
|
IP address |
Protected IPv4 address. |
|
VPN |
This field is not supported in the current software version. MPLS L3VPN instance to which the protected IPv4 address belongs. If the protected IPv4 address is on the public network, this field displays hyphens (--). |
|
Detected on |
Where the attack is detected: the device (Local) or an interface. |
|
Detect type |
Type of the detected flood attack. |
|
State |
Whether the interface or device is attacked: · Attacked. · Normal. |
|
PPS |
Number of packets sent to the IPv4 address per second. |
|
Dropped |
Number of attack packets dropped by the interface or the device. |
|
Totally 2 flood entries |
Total number of IPv4 addresses that are protected. |
display attack-defense flood statistics ipv6
Use display attack-defense flood statistics ipv6 to display IPv6 flood attack detection and prevention statistics.
Syntax
display attack-defense { ack-flood | dns-flood | fin-flood | flood | http-flood | icmpv6-flood | rst-flood | syn-ack-flood | syn-flood | udp-flood } statistics ipv6 [ ipv6-address ] [ interface interface-type interface-number | local ] [ count ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
ack-flood: Specifies ACK flood attack.
dns-flood: Specifies DNS flood attack.
fin-flood: Specifies FIN flood attack.
flood: Specifies all IPv6 flood attacks.
http-flood: Specifies HTTP flood attack.
icmpv6-flood: Specifies ICMPv6 flood attack.
rst-flood: Specifies RST flood attack.
syn-ack-flood: Specifies SYN-ACK flood attack.
syn-flood: Specifies SYN flood attack.
udp-flood: Specifies UDP flood attack.
ipv6-address: Specifies a protected IPv6 address. If you do not specify an IPv6 address, this command displays flood attack detection and prevention statistics for all protected IPv6 addresses.
interface interface-type interface-number: Specifies an interface by its type and number.
local: Specifies the device.
count: Displays the number of matching protected IPv6 addresses.
Usage guidelines
The device collects statistics about protected IP addresses for flood attack detection and prevention. The attackers' IP addresses are not recorded.
If you do not specify the interface or local parameter, this command displays IPv6 flood attack detection and prevention statistics for all interfaces and the device.
Examples
# Display all IPv6 flood attack detection and prevention statistics.
<Sysname> display attack-defense flood statistics ipv6
IPv6 address VPN Detected on Detect type State PPS Dropped
1::2 -- GE1/0/2 DNS-FLOOD Normal 1000 111111111
1::3 -- GE1/0/3 SYN-ACK-FLOOD Normal 1000 222222222
1::4 -- Local ACK-FLOOD Normal 1000 111111111
1::5 -- Local SYN-FLOOD Normal 1000 22222222
# Display the number of IPv6 addresses that are protected against flood attacks.
<Sysname> display attack-defense flood statistics ipv6 count
Totally 5 flood entries.
Table 2 Command output
|
Field |
Description |
|
IPv6 address |
Protected IPv6 address. |
|
VPN |
This field is not supported in the current software version. MPLS L3VPN instance to which the protected IPv6 address belongs. If the protected IPv6 address is on the public network, this field displays hyphens (--). |
|
Detected on |
Where the attack is detected: the device (Local) or an interface. |
|
Detect type |
Type of the detected flood attack. |
|
State |
Whether the interface or device is attacked: · Attacked. · Normal. |
|
PPS |
Number of packets sent to the IPv6 address per second. |
|
Dropped |
Number of attack packets dropped by the interface or the device. |
|
Totally 4 flood entries |
Total number of IPv6 addresses that are protected. |
display attack-defense policy
Use display attack-defense policy to display attack defense policy configuration.
Syntax
display attack-defense policy [ policy-name ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
policy-name: Specifies an attack defense policy by its name. The policy name is a case-insensitive string of 1 to 31 characters. Valid characters include uppercase and lowercase letters, digits, underscores (_), and hyphens (-). If no attack defense policy is specified, this command displays brief information about all attack defense policies.
Usage guidelines
This command output includes the following configuration information about an attack defense policy:
· Whether attack detection is enabled.
· Attack prevention actions.
· Attack prevention trigger thresholds.
Examples
# Display the configuration of attack defense policy abc.
<Sysname> display attack-defense policy abc
Attack-defense Policy Information
--------------------------------------------------------------------------
Policy name : abc
Applied list : Local
GE1/0/1
Vlan1
--------------------------------------------------------------------------
Exempt IPv4 ACL: : Not configured
Exempt IPv6 ACL: : vip
--------------------------------------------------------------------------
Actions: BS-Block source L-Logging D-Drop N-None
Signature attack defense configuration:
Signature name Defense Level Actions
Fragment Enabled Info L
Impossible Enabled Info L
Teardrop Disabled Info L
Tiny fragment Disabled Info L
IP option abnormal Disabled Info L
Smurf Disabled Info N
Traceroute Disabled Medium L,D
Ping of death Disabled Low L
Large ICMP Disabled Medium L,D
Max length 4000 bytes
Large ICMPv6 Disabled Low L
Max length 4000 bytes
TCP invalid flags Disabled medium L,D
TCP null flag Disabled Low L
TCP all flags Enabled Info L
TCP SYN-FIN flags Disabled Info L
TCP FIN only flag Enabled Info L
TCP Land Disabled Info L
Winnuke Disabled Info L
UDP Bomb Disabled Info L
UDP Snork Disabled Info L
UDP Fraggle Enabled Info L
IP option record route Disabled Info L
IP option internet timestamp Enabled Info L
IP option security Disabled Info L
IP option loose source routing Enabled Info L
IP option stream ID Disabled Info L
IP option strict source routing Disabled Info L
IP option route alert Disabled Info L
ICMP echo request Disabled Info L
ICMP echo reply Disabled Info L
ICMP source quench Disabled Info L
ICMP destination unreachable Enabled Info L
ICMP redirect Enabled Info L
ICMP time exceeded Enabled Info L
ICMP parameter problem Disabled Info L
ICMP timestamp request Disabled Info L
ICMP timestamp reply Disabled Info L
ICMP information request Disabled Info L
ICMP information reply Disabled Medium L,D
ICMP address mask request Disabled Medium L,D
ICMP address mask reply Disabled Medium L,D
ICMPv6 echo request Enabled Medium L,D
ICMPv6 echo reply Disabled Medium L,D
ICMPv6 group membership query Disabled Medium L,D
ICMPv6 group membership report Disabled Medium L,D
ICMPv6 group membership reduction Disabled Medium L,D
ICMPv6 destination unreachable Enabled Medium L,D
ICMPv6 time exceeded Enabled Medium L,D
ICMPv6 parameter problem Disabled Medium L,D
ICMPv6 packet too big Disabled Medium L,D
Scan attack defense configuration:
Preset defense:
Defense: Disabled
User-defined defense:
Port scan defense: Enabled
Port scan defense threshold: 5000 packets
IP sweep defense: Enabled
IP sweep defense threshold: 8000 packets
Period: 100s
Actions: L
Flood attack defense configuration:
Flood type Global thres(pps) Global actions Service ports Non-specific
SYN flood 1000 - - Disabled
ACK flood 1000 - - Enabled
SYN-ACK flood 1000 - - Disabled
RST flood 200 - - Enabled
FIN flood 1000 L,D - Disabled
UDP flood 1000 - - Disabled
ICMP flood 1000 - - Disabled
ICMPv6 flood 1000(default) L,D - Disabled
DNS flood 10000 - 30,61 to 62 Enabled
HTTP flood 10000 - 80,8080 Enabled
Flood attack defense for protected IP addresses:
Address VPN instance Flood type Thres(pps) Actions Ports
1::1 -- FIN-FLOOD 10 L,D -
192.168.1.1 -- SYN-ACK-FLOOD 10 - -
1::1 -- FIN-FLOOD - L -
2013:2013:2013:2013: -- DNS-FLOOD 100 L,D 53
2013:2013:2013:2013
Table 3 Command output
|
Field |
Description |
|
Policy name |
Name of the attack defense policy. |
|
Applied list |
Locations to which the attack defense policy is applied: interfaces and Local (Local indicates that the policy is applied to the device). |
|
Exempt IPv4 ACL |
IPv4 ACL used for attack detection exemption. |
|
Exempt IPv6 ACL |
IPv6 ACL used for attack detection exemption. |
|
Actions |
Attack prevention actions: · L—Logging. · D—Dropping packets. · N—No action. |
|
Signature attack defense configuration |
Configuration information about single-packet attack detection and prevention. |
|
Signature name |
Type of the single-packet attack. |
|
Defense |
Whether attack detection is enabled. |
|
Level |
Level of the single-packet attack, info, low, medium, or high. Currently, no high-level single-packet attacks exist. |
|
Actions |
Prevention actions against the scanning attack: · L—Logging. · D—Dropping packets. · N—No action. |
|
Large ICMPv6 |
Large ICMPv6 attack. |
|
ICMPv6 echo request |
ICMPv6 echo request attack. |
|
ICMPv6 echo reply |
ICMPv6 echo reply attack. |
|
ICMPv6 group membership query |
ICMPv6 group membership query attack. |
|
ICMPv6 group membership report |
ICMPv6 group membership report attack. |
|
ICMPv6 group membership reduction |
ICMPv6 group membership reduction attack. |
|
ICMPv6 destination unreachable |
ICMPv6 destination unreachable attack. |
|
ICMPv6 time exceeded |
ICMPv6 time exceeded attack. |
|
ICMPv6 parameter problem |
ICMPv6 parameter problem attack. |
|
ICMPv6 packet too big |
ICMPv6 packet too big attack. |
|
Scan attack defense configuration |
Configuration information about scanning attack detection and prevention. |
|
Preset defense |
Configuration information about predefined scanning attack detection and prevention. |
|
Defense |
Whether scanning attack detection is enabled. |
|
Level |
Level of the scanning attack detection, low, medium, or high. |
|
User-defined defense |
Configuration information about user-defined scanning attack detection and prevention. |
|
Port scan defense |
Status of port scan attack prevention, which can be Enabled or Disabled. |
|
Port scan defense threshold |
Threshold for triggering port scan attack prevention. |
|
IP sweep defense |
Status of IP sweep attack prevention, which can be Enabled or Disabled. |
|
IP sweep defense threshold |
Threshold for triggering IP sweep attack prevention. |
|
Period |
Scanning attack detection cycle in seconds. |
|
Actions |
Scanning attack prevention actions: · D—Dropping packets. · L—Logging. |
|
Flood attack defense configuration |
Configuration information about flood attack detection and prevention. |
|
Flood type |
Type of the flood attack: · ACK flood. · DNS flood. · FIN flood. · ICMP flood. · ICMPv6 flood. · SYN flood. · SYN-ACK flood. · UDP flood. · RST flood. · HTTP flood. |
|
Global thres (pps) |
Global threshold for triggering the flood attack prevention, in units of packets sent to an IP address per second. The default is 1000 pps. |
|
Global actions |
Global prevention actions against the flood attack: · D—Dropping packets. · L—Logging. · -—Not configured. |
|
Service ports |
Ports that are protected against the flood attack. This field displays port numbers only for the DNS and HTTP flood attacks. For other flood attacks, this field displays a hyphen (-). |
|
Non-specific |
Whether the global flood attack detection is enabled. |
|
Flood attack defense for protected IP addresses |
Configuration of the IP address-specific flood attack detection and prevention. |
|
Address |
Protected IP address. |
|
VPN instance |
This field is not supported in the current software version. MPLS L3VPN instance to which the protected IP address belongs. If no MPLS L3VPN instance is specified, this field displays a hyphen (-). |
|
Thres(pps) |
Threshold for triggering the flood attack prevention, in units of packets sent to the IP address per second. If no threshold is specified, this field displays 1000. |
|
Actions |
Flood attack prevention actions: · D—Dropping packets. · L—Logging. · N—No action. |
|
Ports |
Ports that are protected against the flood attack. This field displays port numbers only for the DNS and HTTP flood attacks. For other flood attacks, this field displays a hyphen (-). |
# Display brief information about all attack defense policies.
<Sysname> display attack-defense policy
Attack-defense Policy Brief Information
------------------------------------------------------------
Policy Name Applied list
Atk-policy-1 GigabitEthernet1/0/1
GigabitEthernet1/0/2
P123 GigabitEthernet1/0/2
p1 Local
p12 Local
Table 4 Command output
|
Field |
Description |
|
Policy name |
Name of the attack defense policy. |
|
Applied list |
Locations to which the attack defense policy is applied: interfaces and Local (Local indicates that the policy is applied to the device). |
Related commands
attack-defense policy
display attack-defense policy ip
Use display attack-defense policy ip to display information about IPv4 addresses protected by flood attack detection and prevention.
Syntax
display attack-defense policy policy-name { ack-flood | dns-flood | fin-flood | flood | http-flood | icmp-flood | rst-flood | syn-ack-flood | syn-flood | udp-flood } ip [ ip-address ] [ count ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
policy-name: Specifies an attack defense policy by its name. The policy name is a case-insensitive string of 1 to 31 characters. Valid characters include uppercase and lowercase letters, digits, underscores (_), and hyphens (-).
ack-flood: Specifies ACK flood attack.
dns-flood: Specifies DNS flood attack.
fin-flood: Specifies FIN flood attack.
flood: Specifies all IPv4 flood attacks.
http-flood: Specifies HTTP flood attack.
icmp-flood: Specifies ICMP flood attack.
rst-flood: Specifies RST flood attack.
syn-ack-flood: Specifies SYN-ACK flood attack.
syn-flood: Specifies SYN flood attack.
udp-flood: Specifies UDP flood attack.
ip-address: Specifies a protected IPv4 address. If you do not specify an IPv4 address, this command displays information about all protected IPv4 addresses.
count: Displays the number of matching IPv4 addresses protected by flood attack detection and prevention.
Examples
# Display information about all IPv4 addresses protected by flood attack detection and prevention in attack defense policy abc.
<Sysname> display attack-defense policy abc flood ip
IP address VPN instance Type Rate threshold(PPS) Dropped
123.123.123.123 -- SYN-ACK-FLOOD 100 4294967295
201.55.7.45 -- ICMP-FLOOD 100 10
192.168.11.5 -- DNS-FLOOD 23 100
# Display the number of IPv4 addresses protected by flood attack detection and prevention in attack defense policy abc.
<Sysname> display attack-defense policy abc flood ip count
Totally 3 flood protected IP addresses.
Table 5 Command output
|
Field |
Description |
|
Totally 3 flood protected IP addresses |
Total number of the IPv4 addresses protected by flood attack detection and prevention. |
|
IP address |
Protected IPv4 address. |
|
VPN instance |
This field is not supported in the current software version. MPLS L3VPN instance to which the protected IPv4 address belongs. If the protected IPv4 address is on the public network, this field displays hyphens (--). |
|
Type |
Type of the flood attack. |
|
Rate threshold(PPS) |
Threshold for triggering the flood attack prevention, in units of packets sent to the IP address per second. If no rate threshold is set, this field displays 1000. |
|
Dropped |
Number of dropped attack packets. If the prevention action is logging, this field displays 0. |
display attack-defense policy ipv6
Use display attack-defense policy ipv6 to display information about IPv6 addresses protected by flood attack detection and prevention.
Syntax
display attack-defense policy policy-name { ack-flood | dns-flood | fin-flood | flood | http-flood | icmpv6-flood | rst-flood | syn-ack-flood | syn-flood | udp-flood } ipv6 [ ipv6-address ] [ count ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
policy-name: Specifies an attack defense policy by its name. The policy name is a case-insensitive string of 1 to 31 characters. Valid characters include uppercase and lowercase letters, digits, underscores (_), and hyphens (-).
ack-flood: Specifies ACK flood attack.
dns-flood: Specifies DNS flood attack.
fin-flood: Specifies FIN flood attack.
flood: Specifies all IPv6 flood attacks.
http-flood: Specifies HTTP flood attack.
icmpv6-flood: Specifies ICMPv6 flood attack.
rst-flood: Specifies RST flood attack.
syn-ack-flood: Specifies SYN-ACK flood attack.
syn-flood: Specifies SYN flood attack.
udp-flood: Specifies UDP flood attack.
ipv6-address: Specifies a protected IPv6 address. If you do not specify an IPv6 address, this command displays information about all protected IPv6 addresses.
count: Displays the number of matching IPv6 addresses protected by flood attack detection and prevention.
Examples
# Display information about all IPv6 addresses protected by flood attack detection and prevention in attack defense policy abc.
<Sysname> display attack-defense policy abc flood ipv6
IPv6 address VPN instance Type Rate threshold(PPS) Dropped
2013::127f -- SYN-ACK-FLOOD 100 4294967295
2::5 -- ACK-FLOOD 100 10
1::5 -- ACK-FLOOD 100 23
# Display the number of IPv6 addresses protected by flood attack detection and prevention in attack defense policy abc.
<Sysname> display attack-defense policy abc flood ipv6 count
Totally 3 flood protected IP addresses.
Table 6 Command output
|
Field |
Description |
|
Totally 3 flood protected IP addresses |
Total number of the IPv6 addresses protected by flood attack detection and prevention. |
|
IPv6 address |
Protected IPv6 address. |
|
VPN instance |
This field is not supported in the current software version. MPLS L3VPN instance to which the protected IPv6 address belongs. If the protected IPv6 address is on the public network, this field displays hyphens (--). |
|
Type |
Type of the flood attack. |
|
Rate threshold(PPS) |
Threshold for triggering the flood attack prevention, in units of packets sent to the IPv6 address per second. If no rate threshold is set, this field displays 1000. |
|
Dropped |
Number of dropped attack packets. If the prevention action is logging, this field displays 0. |
display attack-defense scan attacker ip
Use display attack-defense scan attacker ip to display information about IPv4 scanning attackers.
Syntax
display attack-defense scan attacker ip [ interface interface-type interface-number | local ] [ count ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
interface interface-type interface-number: Specifies an interface by its type and number.
local: Specifies the device.
count: Displays the number of matching IPv4 scanning attackers.
Usage guidelines
If you do not specify any parameters, this command displays information about all IPv4 scanning attackers.
Examples
# Display information about all IPv4 scanning attackers.
<Sysname> display attack-defense scan attacker ip
IP addr(DslitePeer) VPN instance Protocol Detected on Duration(min)
192.168.31.2(--) -- TCP GE1/0/2 1284
2.2.2.3(--) -- UDP GE1/0/2 23
192.68.11.2(--) -- TCP Local 782
2.2.2.1(--) -- UDP Local 23
# Display the number of IPv4 scanning attackers.
<Sysname> display attack-defense scan attacker ip count
Totally 3 attackers.
Table 7 Command output
|
Field |
Description |
|
Totally 3 attackers |
Total number of IPv4 scanning attackers. |
|
IP addr(DslitePeer) |
The IP addr field displays the IPv4 address of the attacker. |
|
VPN instance |
This field is not supported in the current software version. MPLS L3VPN instance to which the attacker's IPv4 address belongs. If the IPv4 address is on the public network, this field displays hyphens (--). |
|
Protocol |
Name of the protocol. |
|
Detected on |
Where the attack is detected: the device (Local) or an interface. |
|
Duration(min) |
The amount of time the attack lasts, in minutes. |
Related commands
display attack-defense scan victim ip
scan detect
display attack-defense scan attacker ipv6
Use display attack-defense scan attacker ipv6 to display information about IPv6 scanning attackers.
Syntax
display attack-defense scan attacker ipv6 [ interface interface-type interface-number | local ] [ count ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
interface interface-type interface-number: Specifies an interface by its type and number.
local: Specifies the device.
count: Displays the number of matching IPv6 scanning attackers.
Usage guidelines
If you do not specify any parameters, this command displays information about all IPv6 scanning attackers.
Examples
# Display information about all IPv6 scanning attackers.
<Sysname> display attack-defense scan attacker ipv6
IPv6 address VPN instance Protocol Detected on Duration(min)
2013::2 -- TCP GE1/0/4 1234
1230::22 -- UDP GE1/0/4 10
1002::20 -- TCP Local 782
1230::1 -- UDP Local 10
# Display the number of IPv6 scanning attackers.
<Sysname> display attack-defense scan attacker ipv6 count
Totally 3 attackers.
Table 8 Command output
|
Field |
Description |
|
Totally 3 attackers |
Total number of IPv6 scanning attackers. |
|
IPv6 address |
IPv6 address of the attacker. |
|
VPN instance |
This field is not supported in the current software version. MPLS L3VPN instance to which the attacker IPv6 address belongs. If the attacker IPv6 address is on the public network, this field displays hyphens (--). |
|
Protocol |
Name of the protocol. |
|
Detected on |
Where the attack is detected: the device (Local) or an interface. |
|
Duration(min) |
The amount of time the attack lasts, in minutes. |
Related commands
display attack-defense scan victim ipv6
scan detect
display attack-defense statistics interface
Use display attack-defense statistics interface to display attack detection and prevention statistics on an interface.
Syntax
display attack-defense statistics interface interface-type interface-number
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
interface-type interface-number: Specifies an interface by its type and number.
Examples
# Display attack detection and prevention statistics on GigabitEthernet 1/0/1.
<Sysname> display attack-defense statistics interface gigabitethernet 1/0/1
Attack policy name: abc
Scan attack defense statistics:
AttackType AttackTimes Dropped
Port scan 2 23
IP sweep 3 33
Distribute port scan 1 10
Flood attack defense statistics:
AttackType AttackTimes Dropped
SYN flood 1 0
ACK flood 1 0
SYN-ACK flood 3 5000
RST flood 2 0
FIN flood 2 0
UDP flood 1 0
ICMP flood 1 0
ICMPv6 flood 1 0
DNS flood 1 0
HTTP flood 1 0
Signature attack defense statistics:
AttackType AttackTimes Dropped
IP option record route 1 100
IP option security 2 0
IP option stream ID 3 0
IP option internet timestamp 4 1
IP option loose source routing 5 0
IP option strict source routing 6 0
IP option route alert 3 0
Fragment 1 0
Impossible 1 1
Teardrop 1 1
Tiny fragment 1 0
IP options abnormal 3 0
Smurf 1 0
Ping of death 1 0
Traceroute 1 0
Large ICMP 1 0
TCP NULL flag 1 0
TCP all flags 1 0
TCP SYN-FIN flags 1 0
TCP FIN only flag 1 0
TCP invalid flag 1 0
TCP Land 1 0
Winnuke 1 0
UDP Bomb 1 0
Snork 1 0
Fraggle 1 0
Large ICMPv6 1 0
ICMP echo request 1 0
ICMP echo reply 1 0
ICMP source quench 1 0
ICMP destination unreachable 1 0
ICMP redirect 2 0
ICMP time exceeded 3 0
ICMP parameter problem 4 0
ICMP timestamp request 5 0
ICMP timestamp reply 6 0
ICMP information request 7 0
ICMP information reply 4 0
ICMP address mask request 2 0
ICMP address mask reply 1 0
ICMPv6 echo request 1 1
ICMPv6 echo reply 1 1
ICMPv6 group membership query 1 0
ICMPv6 group membership report 1 0
ICMPv6 group membership reduction 1 0
ICMPv6 destination unreachable 1 0
ICMPv6 time exceeded 1 0
ICMPv6 parameter problem 1 0
ICMPv6 packet too big 1 0
Table 9 Command output
|
Field |
Description |
|
AttackType |
Type of the attack. |
|
AttackTimes |
Number of times that the attack occurred. This command output displays only attacks that are detected. |
|
Dropped |
Number of dropped packets. |
|
ICMPv6 flood |
ICMPv6 flood attack. This field is not displayed when no ICMPv6 flood attack is detected. |
|
Large ICMPv6 |
Large ICMPv6 attack. This field is not displayed when no large ICMPv6 attack is detected. |
|
ICMPv6 echo request |
ICMPv6 echo request attack. This field is not displayed when no ICMPv6 echo request attack is detected. |
|
ICMPv6 echo reply |
ICMPv6 echo reply attack. This field is not displayed when no ICMPv6 echo reply attack is detected. |
|
ICMPv6 group membership query |
ICMPv6 group membership query attack. This field is not displayed when no ICMPv6 group membership query attack is detected. |
|
ICMPv6 group membership report |
ICMPv6 group membership report attack. This field is not displayed when no ICMPv6 group membership report attack is detected. |
|
ICMPv6 group membership reduction |
ICMPv6 group membership reduction attack. This field is not displayed when no ICMPv6 group membership reduction attack is detected. |
|
ICMPv6 destination unreachable |
ICMPv6 destination unreachable attack. This field is not displayed when no ICMPv6 destination unreachable attack is detected. |
|
ICMPv6 time exceeded |
ICMPv6 time exceeded attack. This field is not displayed when no ICMPv6 time exceeded attack is detected. |
|
ICMPv6 parameter problem |
ICMPv6 parameter problem attack. This field is not displayed when no ICMPv6 parameter problem attack is detected. |
|
ICMPv6 packet too big |
ICMPv6 packet too big attack. This field is not displayed when no ICMPv6 packet too big attack is detected. |
display attack-defense statistics local
Use display attack-defense statistics local to display attack detection and prevention statistics for the device.
Syntax
display attack-defense statistics local
Views
Any view
Predefined user roles
network-admin
network-operator
Examples
# Display attack detection and prevention statistics for the device.
<Sysname> display attack-defense statistics local
Attack defense policy name: abc
Scan attack defense statistics:
AttackType AttackTimes Dropped
Port scan 2 23
IP sweep 3 33
Distribute port scan 1 10
Flood attack defense statistics:
AttackType AttackTimes Dropped
SYN flood 1 0
ACK flood 1 0
SYN-ACK flood 3 5000
RST flood 2 0
FIN flood 2 0
UDP flood 1 0
ICMP flood 1 0
ICMPv6 flood 1 0
DNS flood 1 0
HTTP flood 1 0
Signature attack defense statistics:
AttackType AttackTimes Dropped
IP option record route 1 100
IP option security 2 0
IP option stream ID 3 0
IP option internet timestamp 4 1
IP option loose source routing 5 0
IP option strict source routing 6 0
IP option route alert 3 0
Fragment 1 0
Impossible 1 1
Teardrop 1 1
Tiny fragment 1 0
IP options abnormal 3 0
Smurf 1 0
Ping of death 1 0
Traceroute 1 0
Large ICMP 1 0
TCP NULL flag 1 0
TCP all flags 1 0
TCP SYN-FIN flags 1 0
TCP FIN only flag 1 0
TCP invalid flag 1 0
TCP Land 1 0
Winnuke 1 0
UDP Bomb 1 0
Snork 1 0
Fraggle 1 0
Large ICMPv6 1 0
ICMP echo request 1 0
ICMP echo reply 1 0
ICMP source quench 1 0
ICMP destination unreachable 1 0
ICMP redirect 2 0
ICMP time exceeded 3 0
ICMP parameter problem 4 0
ICMP timestamp request 5 0
ICMP timestamp reply 6 0
ICMP information request 7 0
ICMP information reply 4 0
ICMP address mask request 2 0
ICMP address mask reply 1 0
ICMPv6 echo request 1 1
ICMPv6 echo reply 1 1
ICMPv6 group membership query 1 0
ICMPv6 group membership report 1 0
ICMPv6 group membership reduction 1 0
ICMPv6 destination unreachable 1 0
ICMPv6 time exceeded 1 0
ICMPv6 parameter problem 1 0
ICMPv6 packet too big 1 0
Table 10 Command output
|
Field |
Description |
|
AttackType |
Type of the attack. |
|
AttackTimes |
Number of times that the attack occurred. This command output displays only attacks that are detected. |
|
Dropped |
Number of dropped packets. |
|
ICMPv6 flood |
ICMPv6 flood attack. This field is not displayed when no ICMPv6 flood attack is detected. |
|
Large ICMPv6 |
Large ICMPv6 attack. This field is not displayed when no large ICMPv6 attack is detected. |
|
ICMPv6 echo request |
ICMPv6 echo request attack. This field is not displayed when no ICMPv6 echo request attack is detected. |
|
ICMPv6 echo reply |
ICMPv6 echo reply attack. This field is not displayed when no ICMPv6 echo reply attack is detected. |
|
ICMPv6 group membership query |
ICMPv6 group membership query attack. This field is not displayed when no ICMPv6 group membership query attack is detected. |
|
ICMPv6 group membership report |
ICMPv6 group membership report attack. This field is not displayed when no ICMPv6 group membership report attack is detected. |
|
ICMPv6 group membership reduction |
ICMPv6 group membership reduction attack. This field is not displayed when no ICMPv6 group membership reduction attack is detected. |
|
ICMPv6 destination unreachable |
ICMPv6 destination unreachable attack. This field is not displayed when no ICMPv6 destination unreachable attack is detected. |
|
ICMPv6 time exceeded |
ICMPv6 time exceeded attack. This field is not displayed when no ICMPv6 time exceeded attack is detected. |
|
ICMPv6 parameter problem |
ICMPv6 parameter problem attack. This field is not displayed when no ICMPv6 parameter problem attack is detected. |
|
ICMPv6 packet too big |
ICMPv6 packet too big attack. This field is not displayed when no ICMPv6 packet too big attack is detected. |
Related commands
reset attack-defense statistics local
display blacklist destination-ip
Use display blacklist destination-ip to display destination IPv4 blacklist entries.
Syntax
display blacklist destination-ip [ destination-ip-address ] [ count ]
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
destination-ip-address: Specifies a destination IPv4 address.
count: Displays the number of matching destination IPv4 blacklist entries.
Usage guidelines
If you do not specify any parameters, this command displays all destination IPv4 blacklist entries.
Examples
# Display all destination IPv4 blacklist entries.
<Sysname> display blacklist destination-ip
IP address VPN instance Type Aging (sec) Dropped
192.168.11.5 -- Dynamic 10 353452
123.123.123.123 -- Dynamic 123 4294967295
201.55.7.45 -- Manual Never 14478
# Display the number of destination IPv4 blacklist entries.
<Sysname> display blacklist destination-ip count
Totally 3 blacklist entries.
Table 11 Command output
|
Field |
Description |
|
IP address |
IPv4 address in the destination blacklist entry. |
|
VPN instance |
This field is not supported in the current software version. VPN instance to which the blacklisted IPv4 address belongs. If the blacklisted IPv4 address is on the public network, this field is not displayed. |
|
Type |
Type of the destination IPv4 blacklist entry: · Dynamic—Dynamically generated. · Manual—Manually configured. |
|
Aging (sec) |
Remaining aging time of the destination IPv4 blacklist entry, in seconds. If no aging time is set for the entry, this field displays Never. |
|
Dropped |
Number of dropped packets that are destined for the IPv4 address. |
|
Totally 3 blacklist entries. |
Total number of destination IPv4 blacklist entries. |
Related commands
blacklist destination-ip
display blacklist destination-ipv6
Use display blacklist destination-ipv6 to display destination IPv6 blacklist entries.
Syntax
display blacklist destination-ipv6 [ destination-ipv6-address ] [ count ]
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
destination-ipv6-address: Specifies a destination IPv6 address.
count: Displays the number of matching destination IPv6 blacklist entries.
Usage guidelines
If you do not specify any parameters, this command displays all destination IPv6 blacklist entries.
Examples
# Display all destination IPv6 blacklist entries.
<Sysname> display blacklist ipv6
IPv6 address VPN instance Type Aging (sec) Dropped
1::4 -- Manual Never 14478
1::5 -- Dynamic 10 353452
2013:fe07:221a:4011: -- Dynamic 123 4294967295
2013:fe07:221a:4011
# Display the number of destination IPv6 blacklist entries.
<Sysname> display blacklist ipv6 count
Totally 3 blacklist entries.
Table 12 Command output
|
Field |
Description |
|
IPv6 address |
IPv6 address in the destination blacklist entry. |
|
VPN instance |
This field is not supported in the current software version. VPN instance to which the blacklisted IPv6 address belongs. If the blacklisted IPv6 address is on the public network, this field is not displayed. |
|
Type |
Type of the destination IPv6 blacklist entry: · Dynamic—Dynamically generated. · Manual—Manually configured. |
|
Aging (sec) |
Remaining aging time of the destination IPv6 blacklist entry, in seconds. If no aging time is set for the entry, this field displays Never. |
|
Dropped |
Number of dropped packets that are destined for the IPv6 address. |
|
Totally 3 blacklist entries. |
Total number of destination IPv6 blacklist entries. |
Related commands
blacklist destination-ipv6
display blacklist ip
Use display blacklist ip to display source IPv4 blacklist entries.
Syntax
display blacklist ip [ source-ip-address ] [ count ]
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
source-ip-address: Specifies a source IPv4 address.
count: Displays the number of matching source IPv4 blacklist entries.
Usage guidelines
If you do not specify any parameters, this command displays all source IPv4 blacklist entries.
Examples
# Display all source IPv4 blacklist entries.
<Sysname> display blacklist ip
IP address VPN instance DS-Lite tunnel peer Type TTL(sec) Dropped
192.168.11.5 -- -- Dynamic 10 353452
# Display the number of source IPv4 blacklist entries.
<Sysname> display blacklist ip count
Totally 3 blacklist entries.
Table 13 Command output
|
Field |
Description |
|
IP address |
IPv4 address in the source blacklist entry. |
|
VPN instance |
This field is not supported in the current software version. VPN instance to which the blacklisted IPv4 address belongs. If the blacklisted IPv4 address is on the public network, this field is not displayed. |
|
DS-Lite tunnel peer |
This field is not supported in the current software version. IPv6 address of the DS-Lite tunnel peer. If the device is the AFTR of a DS-Lite tunnel, this field displays the IPv6 address of the B4 element from which the packet comes. In other situations, this field displays hyphens (--). |
|
Type |
Type of the source IPv4 blacklist entry: · Dynamic—Dynamically generated. · Manual—Manually configured. |
|
TTL(sec) |
Remaining aging time of the source IPv4 blacklist entry, in seconds. If no aging time is set for the entry, this field displays Never. |
|
Dropped |
Number of dropped packets that are sourced from the IPv4 address. |
|
Totally 3 blacklist entries. |
Total number of source IPv4 blacklist entries. |
Related commands
blacklist ip
display blacklist ipv6
Use display blacklist ipv6 to display source IPv6 blacklist entries.
Syntax
display blacklist ipv6 [ source-ipv6-address ] [ count ]
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
source-ipv6-address: Specifies a source IPv6 address.
count: Displays the number of matching source IPv6 blacklist entries.
Usage guidelines
If you do not specify any parameters, this command displays all source IPv6 blacklist entries.
Examples
# Display all source IPv6 blacklist entries.
<Sysname> display blacklist ipv6
IPv6 address VPN instance Type TTL(sec) Dropped
1::4 -- Manual Never 14478
1::5 -- Dynamic 10 353452
2013:fe07:221a:4011: -- Dynamic 123 4294967295
2013:fe07:221a:4011
# Display the number of source IPv6 blacklist entries.
<Sysname> display blacklist ipv6 count
Totally 3 blacklist entries.
Table 14 Command output
|
Field |
Description |
|
IPv6 address |
IPv6 address in the source blacklist entry. |
|
VPN instance |
This field is not supported in the current software version. VPN instance to which the blacklisted IPv6 address belongs. If the blacklisted IPv6 address is on the public network, this field is not displayed. |
|
Type |
Type of the source IPv6 blacklist entry: · Dynamic—Dynamically generated. · Manual—Manually configured. |
|
TTL(sec) |
Remaining aging time of the source IPv6 blacklist entry, in seconds. If no aging time is set for the entry, this field displays Never. |
|
Dropped |
Number of dropped packets that are sourced from the IPv6 address. |
|
Totally 3 blacklist entries. |
Total number of source IPv6 blacklist entries. |
Related commands
blacklist ipv6
dns-flood action
Use dns-flood action to specify global actions against DNS flood attacks.
Use undo dns-flood action to restore the default.
Syntax
dns-flood action { drop | logging } *
undo dns-flood action
Default
No global action is specified for DNS flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent DNS packets destined for the victim IP addresses.
logging: Enables logging for DNS flood attack events.
Examples
# Specify drop as the global action against DNS flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] dns-flood action drop
Related commands
dns-flood detect
dns-flood detect non-specific
dns-flood threshold
dns-flood detect
Use dns-flood detect to configure IP address-specific DNS flood attack detection.
Use undo dns-flood detect to remove the IP address-specific DNS flood attack detection configuration.
Syntax
dns-flood detect { ip ipv4-address | ipv6 ipv6-address } [ port port-list ] [ threshold threshold-value ] [ action { { drop | logging } * | none } ]
undo dns-flood detect { ip ipv4-address | ipv6 ipv6-address }
Default
IP address-specific DNS flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ip ipv4-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be 255.255.255.255 or 0.0.0.0.
ipv6 ipv6-address: Specifies the IPv6 address to be protected.
port port-list: Specifies a space-separated list of up to 24 port number items. Each item specifies a port by its port number or a range of ports in the form of start-port-number to end-port-number. The end-port-number cannot be smaller than the start-port-number. If you do not specify this option, the global ports apply.
threshold threshold-value: Specifies the threshold for triggering DNS flood attack prevention. The value range is 1 to 1000000 in units of DNS packets sent to the specified IP address per second.
action: Specifies the actions when a DNS flood attack is detected. If no action is specified, the global actions set by the dns-flood action command apply.
drop: Drops subsequent DNS packets destined for the protected IP address.
logging: Enables logging for DNS flood attack events.
none: Takes no action.
Usage guidelines
With DNS flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of DNS packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure DNS flood attack detection for multiple IP addresses in one attack defense policy.
Examples
# Configure DNS flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] dns-flood detect ip 192.168.1.2 port 53 threshold 2000
Related commands
dns-flood action
dns-flood detect non-specific
dns-flood threshold
dns-flood port
dns-flood detect non-specific
Use dns-flood detect non-specific to enable global DNS flood attack detection.
Use undo dns-flood detect non-specific to disable global DNS flood attack detection.
Syntax
dns-flood detect non-specific
undo dns-flood detect non-specific
Default
Global DNS flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global DNS flood attack detection applies to all IP addresses except for those specified by the dns-flood detect command. The global detection uses the global trigger threshold set by the dns-flood threshold command and global actions specified by the dns-flood action command.
Examples
# Enable global DNS flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] dns-flood detect non-specific
Related commands
dns-flood action
dns-flood detect
dns-flood threshold
dns-flood port
Use dns-flood port to specify the global ports to be protected against DNS flood attacks.
Use undo dns-flood port to restore the default.
Syntax
dns-flood port port-list
undo dns-flood port
Default
The global DNS flood attack prevention protects port 53.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
port-list: Specifies a space-separated list of up to 32 port number items. Each item specifies a port by its port number or a range of ports in the form of start-port-number to end-port-number. The end-port-number cannot be smaller than the start-port-number.
Usage guidelines
The device detects only DNS packets destined for the specified ports.
The global ports apply to global DNS flood attack detection and IP address-specific DNS flood attack detection with no port specified.
Examples
# Specify the ports 53 and 61000 as the global ports to be protected against DNS flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] dns-flood port 53 61000
Related commands
dns-flood action
dns-flood detect
dns-flood detect non-specific
dns-flood threshold
Use dns-flood threshold to set the global threshold for triggering DNS flood attack prevention.
Use undo dns-flood threshold to restore the default.
Syntax
dns-flood threshold threshold-value
undo dns-flood threshold
Default
The global threshold is 1000 for triggering DNS flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of DNS packets sent to an IP address per second.
Usage guidelines
With global DNS flood attack detection configured, the device is in attack detection state. When the sending rate of DNS packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global DNS flood attack detection. Adjust the threshold according to the application scenarios. If the number of DNS packets sent to a protected DNS server is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering DNS flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] dns-flood threshold 100
Related commands
dns-flood action
dns-flood detect
dns-flood detect non-specific
exempt acl
Use exempt acl to configure attack detection exemption.
Use undo exempt acl to restore the default.
Syntax
exempt acl [ ipv6 ] { acl-number | name acl-name }
undo exempt acl [ ipv6 ]
Default
Attack detection exemption is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ipv6: Specifies an IPv6 ACL. To specify an IPv4 ACL, do not use this keyword.
acl-number: Specifies an ACL by its number:
· 2000 to 2999 for basic ACLs.
· 3000 to 3999 for advanced ACLs.
name acl-name: Specifies an ACL by its name. The acl-name argument is a case-insensitive string of 1 to 63 characters. It must start with an English letter and to avoid confusion, it cannot be all.
Usage guidelines
The attack defense policy uses an ACL to identify exempted packets. The policy does not check the packets permitted by the ACL. You can configure the ACL to identify packets from trusted hosts. The exemption feature reduces the false alarm rate and improves packet processing efficiency.
If an ACL is used for attack detection exemption, only the following match criteria in the ACL permit rules take effect:
· Source IP address.
· Destination IP address.
· Source port.
· Destination port.
· Protocol.
· The fragment keyword for matching non-first fragments.
If the specified ACL does not exist or does not contain a rule, attack detection exemption does not take effect.
Examples
# Configure an ACL to permit packets sourced from 1.1.1.1. Configure attack detection exemption for packets matching the ACL in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] acl basic 2001
[Sysname-acl-ipv4-basic-2001] rule permit source 1.1.1.1 0
[Sysname-acl-ipv4-basic-2001] quit
[Sysname] attack-defense policy atk-policy-1
[attack-defense-policy-atk-policy-1] exempt acl 2001
Related commands
attack-defense policy
fin-flood action
Use fin-flood action to specify global actions against FIN flood attacks.
Use undo fin-flood action to restore the default.
Syntax
fin-flood action { drop | logging } *
undo fin-flood action
Default
No global action is specified for FIN flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent FIN packets destined for the victim IP addresses.
logging: Enables logging for FIN flood attack events.
Examples
# Specify drop as the global action against FIN flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] fin-flood action drop
Related commands
fin-flood detect
fin-flood detect non-specific
fin-flood threshold
fin-flood detect
Use fin-flood detect to configure IP address-specific FIN flood attack detection.
Use undo fin-flood detect to remove the IP address-specific FIN flood attack detection configuration.
Syntax
fin-flood detect { ip ipv4-address | ipv6 ipv6-address } [ threshold threshold-value ] [ action { { drop | logging } * | none } ]
undo fin-flood detect { ip ipv4-address | ipv6 ipv6-address }
Default
IP address-specific FIN flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ip ipv4-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be 255.255.255.255 or 0.0.0.0.
ipv6 ipv6-address: Specifies the IPv6 address to be protected.
threshold threshold-value: Specifies the threshold for triggering FIN flood attack prevention. The value range is 1 to 1000000 in units of FIN packets sent to the specified IP address per second.
action: Specifies the actions when a FIN flood attack is detected. If no action is specified, the global actions set by the fin-flood action command apply.
drop: Drops subsequent FIN packets destined for the protected IP address.
logging: Enables logging for FIN flood attack events.
none: Takes no action.
Usage guidelines
With FIN flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of FIN packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure FIN flood attack detection for multiple IP addresses in one attack defense policy.
Examples
# Configure FIN flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] fin-flood detect ip 192.168.1.2 threshold 2000
Related commands
fin-flood action
fin-flood detect non-specific
fin-flood threshold
fin-flood detect non-specific
Use fin-flood detect non-specific to enable global FIN flood attack detection.
Use undo fin-flood detect non-specific to disable global FIN flood attack detection.
Syntax
fin-flood detect non-specific
undo fin-flood detect non-specific
Default
Global FIN flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global FIN flood attack detection applies to all IP addresses except for those specified by the fin-flood detect command. The global detection uses the global trigger threshold set by the fin-flood threshold command and global actions specified by the fin-flood action command.
Examples
# Enable global FIN flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] fin-flood detect non-specific
Related commands
fin-flood action
fin-flood detect
fin-flood threshold
fin-flood threshold
Use fin-flood threshold to set the global threshold for triggering FIN flood attack prevention.
Use undo fin-flood threshold to restore the default.
Syntax
fin-flood threshold threshold-value
undo fin-flood threshold
Default
The global threshold is 1000 for triggering FIN flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of FIN packets sent to an IP address per second.
Usage guidelines
With global FIN flood attack detection configured, the device is in attack detection state. When the sending rate of FIN packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global FIN flood attack detection. Adjust the threshold according to the application scenarios. If the number of FIN packets sent to a protected server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering FIN flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] fin-flood threshold 100
Related commands
fin-flood action
fin-flood detect
fin-flood detect non-specific
http-flood action
Use http-flood action to specify global actions against HTTP flood attacks.
Use undo http-flood action to restore the default.
Syntax
http-flood action { drop | logging } *
undo http-flood action
Default
No global action is specified for HTTP flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent HTTP packets destined for the victim IP addresses.
logging: Enables logging for HTTP flood attack events.
Examples
# Specify drop as the global action against HTTP flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] http-flood action drop
Related commands
http-flood detect
http-flood detect non-specific
http-flood threshold
http-flood detect
Use http-flood detect to configure IP address-specific HTTP flood attack detection.
Use undo http-flood detect to remove the IP address-specific HTTP flood attack detection configuration.
Syntax
http-flood detect { ip ipv4-address | ipv6 ipv6-address } [ port port-list ] [ threshold threshold-value ] [ action { { drop | logging } * | none } ]
undo http-flood detect { ip ipv4-address | ipv6 ipv6-address }
Default
IP address-specific HTTP flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ip ipv4-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be 255.255.255.255 or 0.0.0.0.
ipv6 ipv6-address: Specifies the IPv6 address to be protected.
port port-list: Specifies a space-separated list of up to 24 port number items. Each item specifies a port by its port number or a range of ports in the form of start-port-number to end-port-number. The end-port-number cannot be smaller than the start-port-number. If you do not specify this option, the global ports apply.
threshold threshold-value: Specifies the threshold for triggering HTTP flood attack prevention. The value range is 1 to 1000000 in units of HTTP packets sent to the specified IP address per second.
action: Specifies the actions when an HTTP flood attack is detected. If no action is specified, the global actions set by the http-flood action command apply.
drop: Drops subsequent HTTP packets destined for the protected IP address.
logging: Enables logging for HTTP flood attack events.
none: Takes no action.
Usage guidelines
With HTTP flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of HTTP packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure HTTP flood attack detection for multiple IP addresses in one attack defense policy.
Examples
# Configure HTTP flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] http-flood detect ip 192.168.1.2 port 80 8080 threshold 2000
Related commands
http-flood action
http-flood detect non-specific
http-flood threshold
http-flood port
http-flood detect non-specific
Use http-flood detect non-specific to enable global HTTP flood attack detection.
Use undo http-flood detect non-specific to disable global HTTP flood attack detection.
Syntax
http-flood detect non-specific
undo http-flood detect non-specific
Default
Global HTTP flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global HTTP flood attack detection applies to all IP addresses except for those specified by the http-flood detect command. The global detection uses the global trigger threshold set by the http-flood threshold command and global actions specified by the http-flood action command.
Examples
# Enable global HTTP flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] dns-flood detect non-specific
Related commands
http-flood action
http-flood detect
http-flood threshold
http-flood port
Use http-flood port to specify the global ports to be protected against HTTP flood attacks.
Use undo http-flood port to restore the default.
Syntax
http-flood port port-list
undo http-flood port
Default
The global HTTP flood attack prevention protects port 80.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
port-list: Specifies a space-separated list of up to 32 port number items. Each item specifies a port by its port number or a range of ports in the form of start-port-number to end-port-number. The end-port-number cannot be smaller than the start-port-number.
Usage guidelines
The device detects only HTTP packets destined for the specified ports.
The global ports apply to global HTTP flood attack detection and IP address-specific HTTP flood attack detection with no port specified.
Examples
# Specify the ports 80 and 8080 as the global ports to be protected against HTTP flood attacks in attack the defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] http-flood port 80 8080
Related commands
http-flood action
http-flood detect
http-flood detect non-specific
http-flood threshold
Use http-flood threshold to set the global threshold for triggering HTTP flood attack prevention.
Use undo http-flood threshold to restore the default.
Syntax
http-flood threshold threshold-value
undo http-flood threshold
Default
The global threshold is 1000 for triggering HTTP flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of HTTP packets sent to an IP address per second.
Usage guidelines
With global HTTP flood attack detection configured, the device is in attack detection state. When the sending rate of HTTP packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global HTTP flood attack detection. Adjust the threshold according to the application scenarios. If the number of HTTP packets sent to a protected HTTP server is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering HTTP flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] http-flood threshold 100
Related commands
http-flood action
http-flood detect
http-flood detect non-specific
icmp-flood action
Use icmp-flood action to specify global actions against ICMP flood attacks.
Use undo icmp-flood action to restore the default.
Syntax
icmp-flood action { drop | logging } *
undo icmp-flood action
Default
No global action is specified for ICMP flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent ICMP packets destined for the victim IP addresses.
logging: Enables logging for ICMP flood attack events.
Examples
# Specify drop as the global action against ICMP flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmp-flood action drop
Related commands
icmp-flood detect non-specific
icmp-flood detect ip
icmp-flood threshold
icmp-flood detect ip
Use icmp-flood detect ip to configure IP address-specific ICMP flood attack detection.
Use undo icmp-flood detect ip to remove the IP address-specific ICMP flood attack detection configuration.
Syntax
icmp-flood detect ip ip-address [ threshold threshold-value ] [ action { { drop | logging } * | none } ]
undo icmp-flood detect ip ip-address
Default
IP address-specific ICMP flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ip-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be 255.255.255.255 or 0.0.0.0.
threshold threshold-value: Specifies the threshold for triggering ICMP flood attack prevention. The value range is 1 to 1000000 in units of ICMP packets sent to the specified IP address per second.
action: Specifies the actions when an ICMP flood attack is detected. If no action is specified, the global actions set by the icmp-flood action command apply.
drop: Drops subsequent ICMP packets destined for the protected IP address.
logging: Enables logging for ICMP flood attack events.
none: Takes no action.
Usage guidelines
With ICMP flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of ICMP packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure ICMP flood attack detection for multiple IP addresses in one attack defense policy.
Examples
# Configure ICMP flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmp-flood detect ip 192.168.1.2 threshold 2000
Related commands
icmp-flood action
icmp-flood detect non-specific
icmp-flood threshold
icmp-flood detect non-specific
Use icmp-flood detect non-specific to enable global ICMP flood attack detection.
Use undo icmp-flood detect non-specific to disable global ICMP flood attack detection.
Syntax
icmp-flood detect non-specific
undo icmp-flood detect non-specific
Default
Global ICMP flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global ICMP flood attack detection applies to all IP addresses except for those specified by the icmp-flood detect ip command. The global detection uses the global trigger threshold set by the icmp-flood threshold command and global actions specified by the icmp-flood action command.
Examples
# Enable global ICMP flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmp-flood detect non-specific
Related commands
icmp-flood action
icmp-flood detect ip
icmp-flood threshold
icmp-flood threshold
Use icmp-flood threshold to set the global threshold for triggering ICMP flood attack prevention.
Use undo icmp-flood threshold to restore the default.
Syntax
icmp-flood threshold threshold-value
undo icmp-flood threshold
Default
The global threshold is 1000 for triggering ICMP flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of ICMP packets sent to an IP address per second.
Usage guidelines
With global ICMP flood attack detection configured, the device is in attack detection state. When the sending rate of ICMP packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global ICMP flood attack detection. Adjust the threshold according to the application scenarios. If the number of ICMP packets sent to a protected server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering ICMP flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmp-flood threshold 100
Related commands
icmp-flood action
icmp-flood detect ip
icmp-flood detect non-specific
icmpv6-flood action
Use icmpv6-flood action to specify global actions against ICMPv6 flood attacks.
Use undo icmpv6-flood action to restore the default.
Syntax
icmpv6-flood action { drop | logging } *
undo icmpv6-flood action
Default
No global action is specified for ICMPv6 flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent ICMPv6 packets destined for the victim IP addresses.
logging: Enables logging for ICMPv6 flood attack events.
Examples
# Specify drop as the global action against ICMPv6 flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmpv6-flood action drop
Related commands
icmpv6-flood detect ipv6
icmpv6-flood detect non-specific
icmpv6-flood threshold
icmpv6-flood detect ipv6
Use icmpv6-flood detect ipv6 to configure IPv6 address-specific ICMPv6 flood attack detection.
Use undo icmpv6-flood detect ipv6 to remove the IPv6 address-specific ICMPv6 flood attack detection configuration.
Syntax
icmpv6-flood detect ipv6 ipv6-address [ threshold threshold-value ] [ action { { drop | logging } * | none } ]
undo icmpv6-flood detect ipv6 ipv6-address
Default
IPv6 address-specific ICMPv6 flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
Ipv6-address: Specifies the IPv6 address to be protected.
threshold threshold-value: Specifies the threshold for triggering ICMPv6 flood attack prevention. The value range is 1 to 1000000 in units of ICMPv6 packets sent to the specified IP address per second.
action: Specifies the actions when an ICMPv6 flood attack is detected. If no action is specified, the global actions set by the icmpv6-flood action command apply.
drop: Drops subsequent ICMPv6 packets destined for the protected IPv6 address.
logging: Enables logging for ICMPv6 flood attack events.
none: Takes no action.
Usage guidelines
With ICMPv6 flood attack detection configured for an IPv6 address, the device is in attack detection state. When the sending rate of ICMPv6 packets to the IPv6 address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure ICMPv6 flood attack detection for multiple IPv6 addresses in one attack defense policy.
Examples
# Configure ICMPv6 flood attack detection for 2012::12 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmpv6-flood detect ipv6 2012::12 threshold 2000
Related commands
icmpv6-flood action
icmpv6-flood detect non-specific
icmpv6-flood threshold
icmpv6-flood detect non-specific
Use icmpv6-flood detect non-specific to enable global ICMPv6 flood attack detection.
Use undo icmpv6-flood detect non-specific to disable global ICMPv6 flood attack detection.
Syntax
icmpv6-flood detect non-specific
undo icmpv6-flood detect non-specific
Default
Global ICMPv6 flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global ICMPv6 flood attack detection applies to all IPv6 addresses except for those specified by the icmpv6-flood detect ipv6 command. The global detection uses the global trigger threshold set by the icmpv6-flood threshold command and global actions specified by the icmpv6-flood action command.
Examples
# Enable global ICMPv6 flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmpv6-flood detect non-specific
Related commands
icmpv6-flood action
icmpv6-flood detect ipv6
icmpv6-flood threshold
icmpv6-flood threshold
Use icmpv6-flood threshold to set the global threshold for triggering ICMPv6 flood attack prevention.
Use undo icmpv6-flood threshold to restore the default.
Syntax
icmpv6-flood threshold threshold-value
undo icmpv6-flood threshold
Default
The global threshold is 1000 for triggering ICMPv6 flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of ICMPv6 packets sent to an IP address per second.
Usage guidelines
With global ICMPv6 flood attack detection configured, the device is in attack detection state. When the sending rate of ICMPv6 packets to an IPv6 address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global ICMPv6 flood attack detection. Adjust the threshold according to the application scenarios. If the number of ICMPv6 packets sent to a protected server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering ICMPv6 flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmpv6-flood threshold 100
Related commands
icmpv6-flood action
icmpv6-flood detect ipv6
icmpv6-flood detect non-specific
reset attack-defense policy flood
Use reset attack-defense policy flood statistics to clear flood attack detection and prevention statistics for protected IP addresses.
Syntax
reset attack-defense policy policy-name flood protected { ip | ipv6 } statistics
Views
User view
Predefined user roles
network-admin
Parameters
policy-name: Specifies an attack defense policy by its name. The policy name is a case-insensitive string of 1 to 31 characters. Valid characters include uppercase and lowercase letters, digits, underscores (_), and hyphens (-).
ip: Specifies protected IPv4 addresses.
ipv6: Specifies protected IPv6 addresses.
statistics: Clears flood attack detection and prevention statistics.
Examples
# Clear flood attack detection and prevention statistics for protected IPv4 addresses in attack defense policy abc.
<Sysname> reset attack-defense policy abc flood protected ip statistics
# Clear flood attack detection and prevention statistics for protected IPv6 addresses in attack defense policy abc.
<Sysname> reset attack-defense policy abc flood protected ipv6 statistics
Related commands
display attack-defense policy ip
display attack-defense policy ipv6
reset attack-defense statistics interface
Use reset attack-defense statistics interface to clear attack detection and prevention statistics for an interface.
Syntax
reset attack-defense statistics interface interface-type interface-number
Views
User view
Predefined user roles
network-admin
Parameters
interface-type interface-number: Specifies an interface by its type and number.
Examples
# Clear attack detection and prevention statistics for GigabitEthernet 1/0/1.
<Sysname> reset attack-defense statistics interface gigabitethernet 1/0/1
Related commands
display attack defense policy
reset attack-defense statistics local
Use reset attack-defense statistics local to clear attack detection and prevention statistics for the device.
Syntax
reset attack-defense statistics local
Views
User view
Predefined user roles
network-admin
Examples
# Clear attack detection and prevention statistics for the device.
<Sysname> reset attack-defense statistics local
Related commands
display attack-defense statistics local
reset blacklist destination-ip
Use reset blacklist destination-ip to delete dynamic destination IPv4 blacklist entries.
Syntax
reset blacklist destination-ip { destination-ip-address | all }
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
User view
Predefined user roles
network-admin
Parameters
destination-ip-address: Specifies an IPv4 address.
all: Specifies all dynamic destination IPv4 blacklist entries.
Usage guidelines
This command deletes only dynamic destination IPv4 blacklist entries. To delete manual destination IPv4 blacklist entries, use the undo blacklist destination-ip command.
Examples
# Delete all dynamic destination IPv4 blacklist entries.
<Sysname> reset blacklist destination-ip all
Related commands
display blacklist destination-ip
reset blacklist destination-ipv6
Use reset blacklist destination-ipv6 to delete dynamic destination IPv6 blacklist entries.
Syntax
reset blacklist destination-ipv6{ destination-ipv6-address | all }
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
User view
Predefined user roles
network-admin
Parameters
destination-ipv6-address : Specifies an IPv6 address.
all: Specifies all dynamic destination IPv4 blacklist entries.
Usage guidelines
This command deletes only dynamic destination IPv6 blacklist entries. To delete manual destination IPv6 blacklist entries, use the undo blacklist destination-ipv6 command.
Examples
# Delete all dynamic destination IPv6 blacklist entries.
<Sysname> reset blacklist destination-ipv6 all
Related commands
display blacklist ipv6
reset blacklist ip
Use reset blacklist ip to delete dynamic IPv4 blacklist entries.
Syntax
reset blacklist ip { source-ip-address | all }
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
User view
Predefined user roles
network-admin
Parameters
source-ip-address: Specifies the IPv4 address for a blacklist entry.
all: Specifies all dynamic IPv4 blacklist entries.
Usage guidelines
This command deletes only dynamic IPv4 blacklist entries. To delete manual IPv4 blacklist entries, use the undo blacklist ip command.
Examples
# Delete all dynamic IPv4 blacklist entries.
<Sysname> reset blacklist ip all
Related commands
display blacklist ip
reset blacklist ipv6
Use reset blacklist ipv6 to delete dynamic IPv6 blacklist entries.
Syntax
reset blacklist ipv6 { source-ipv6-address | all }
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
User view
Predefined user roles
network-admin
Parameters
source-ipv6-address: Specifies the IPv6 address for a blacklist entry.
all: Specifies all dynamic IPv6 blacklist entries.
Usage guidelines
This command deletes only dynamic IPv6 blacklist entries. To delete manual IPv6 blacklist entries, use the undo blacklist ipv6 command.
Examples
# Delete all dynamic IPv6 blacklist entries.
<Sysname> reset blacklist ipv6 all
Related commands
display blacklist ipv6
reset blacklist statistics
Use reset blacklist statistics to clear blacklist statistics.
Syntax
reset blacklist statistics
The following compatibility matrixes show the support of the device models for this command:
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3500X series |
WX3510X WX3520X WX3540X |
EWP-WX3510X EWP-WX3520X EWP-WX3540X |
Yes |
|
WCG380 series |
WCG382 |
EWP-WCG382 |
No |
|
Series |
Models |
Product codes |
Command compatibility |
|
WX3800X series |
WX3820X WX3840X |
EWP-WX3820X EWP-WX3840X |
No |
Views
User view
Predefined user roles
network-admin
Usage guidelines
This command resets the counter for dropped packets for all blacklist entries.
Examples
# Clear blacklist statistics.
<Sysname> reset blacklist statistics
Related commands
display blacklist ip
display blacklist ipv6
rst-flood detect non-specific
Use rst-flood detect non-specific to enable global RST flood attack detection.
Use undo rst-flood detect non-specific to disable global RST flood attack detection.
Syntax
rst-flood detect non-specific
undo rst-flood detect non-specific
Default
Global RST flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global RST flood attack detection applies to all IP addresses except for those specified by the rst-flood detect command. The global detection uses the global trigger threshold set by the rst-flood threshold command and global actions specified by the rst-flood action command.
Examples
# Enable global RST flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] rst-flood detect non-specific
Related commands
rst-flood action
rst-flood detect
rst-flood threshold
rst-flood threshold
Use rst-flood threshold to set the global threshold for triggering RST flood attack prevention.
Use undo rst-flood threshold to restore the default.
Syntax
rst-flood threshold threshold-value
undo rst-flood threshold
Default
The global threshold is 1000 for triggering RST flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of RST packets sent to an IP address per second.
Usage guidelines
With global RST flood attack detection configured, the device is in attack detection state. When the sending rate of RST packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global RST flood attack detection. Adjust the threshold according to the application scenarios. If the number of RST packets sent to a protected server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering RST flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] rst-flood threshold 100
Related commands
rst-flood action
rst-flood detect
rst-flood detect non-specific
scan detect
Use scan detect to configure scanning attack detection.
Use undo scan detect to remove the scanning attack detection configuration.
Syntax
scan detect level { { high | low | medium } | user-defined { port-scan-threshold threshold-value | ip-sweep-threshold threshold-value } * [ period period-value ] } action { drop | logging } *
undo scan detect level { high | low | medium }
Default
No scanning attack detection is configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
level: Specifies the level of the scanning attack detection.
high: Specifies the high level. This level can detect most of the scanning attacks, but has a high false alarm rate. Some packets from active hosts might be considered as attack packets. For high level detection, the detection cycle is 10 seconds. The threshold for triggering port scan attack prevention is 5000 packets in a detection cycle. The threshold for triggering IP sweep attack prevention is 5000 packets in a detection cycle.
low: Specifies the low level. This level provides basic scanning attack detection. It has a low false alarm rate but many scanning attacks cannot be detected. For low level detection, the detection cycle is 10 seconds. The threshold for triggering port scan attack prevention is 100000 packets in a detection cycle. The threshold for triggering IP sweep attack prevention is 100000 packets in a detection cycle.
medium: Specifies the medium level. Compared with the high and low levels, this level has medium false alarm rate and attack detection accuracy. For medium level detection, the detection cycle is 10 seconds. The threshold for triggering port scan attack prevention is 40000 packets. The threshold for triggering IP sweep attack prevention is 40000 packets.
user-defined: Specifies the user-defined level. This level allows you to set the thresholds and detection cycle for port scan and IP sweep attacks on demand.
port-scan-threshold threshold-value: Sets the user-defined threshold for triggering port scan attack prevention. The value range is 1 to 1000000000. This threshold defines the maximum number of packets sent from an IP address to different ports within a detection cycle.
ip-sweep-threshold threshold-value: Sets the user-defined threshold for triggering IP sweep attack prevention. The value range is 1 to 1000000000. This threshold defines the maximum number of packets sent from an IP address to different IP addresses within a detection cycle.
period period-value: Sets the scanning attack detection cycle in the range of 1 to 1000000000 seconds. The default value is 10.
action: Specifies the actions against scanning attacks.
drop: Drops subsequent packets from detected scanning attack sources.
logging: Enables logging for scanning attack events.
Examples
# Configure low level scanning attack detection and specify the prevention action as drop in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] scan detect level low action drop
# Configure scanning attack detection in attack defense policy atk-policy-1. Specify the detection level as low and the prevention action as logging.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] scan detect level low action logging
# Configure scanning attack detection in the attack defense policy atk-policy-1. Specify the detection level as user-defined and detection cycle as 30 seconds. Set the port scan attack prevention threshold and IP sweep attack prevention threshold to 6000 packets and 80000 packets, respectively. Specify the prevention action as logging.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] scan detect level user-defined port-scan-threshold 6000 ip-sweep-threshold 80000 period 30 action logging
signature { large-icmp | large-icmpv6 } max-length
Use signature { large-icmp | large-icmpv6 } max-length to set the maximum length of safe ICMP or ICMPv6 packets. A large ICMP or ICMPv6 attack occurs if an ICMP or ICMPv6 packet larger than the specified length is detected.
Use undo signature { large-icmp | large-icmpv6 } max-length to restore the default.
Syntax
signature { large-icmp | large-icmpv6 } max-length length
undo signature { large-icmp | large-icmpv6 } max-length
Default
The maximum length of safe ICMP or ICMPv6 packets is 4000 bytes.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
large-icmp: Specifies large ICMP packet attack signature.
large-icmpv6: Specifies large ICMPv6 packet attack signature.
length: Specifies the maximum length of safe ICMP or ICMPv6 packets, in bytes. The value range for ICMP packets is 28 to 65534. The value range for ICMPv6 packets is 48 to 65534.
Examples
# Set the maximum length of safe ICMP packets for large ICMP attack to 50000 bytes in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] signature large-icmp max-length 50000
Related commands
signature detect
signature detect
Use signature detect to enable signature detection for single-packet attacks and specify the prevention actions.
Use undo signature detect to disable signature detection for single-packet attacks.
Syntax
signature detect { fraggle | fragment | impossible | land | large-icmp | large-icmpv6 | smurf | snork | tcp-all-flags | tcp-fin-only | tcp-invalid-flags | tcp-null-flag | tcp-syn-fin | tiny-fragment | traceroute | udp-bomb | winnuke } [ action { { drop | logging } * | none } ]
undo signature detect { fraggle | fragment | impossible | land | large-icmp | large-icmpv6 | smurf | snork | tcp-all-flags | tcp-fin-only | tcp-invalid-flags | tcp-null-flag | tcp-syn-fin | tiny-fragment | traceroute | udp-bomb | winnuke }
signature detect { ip-option-abnormal | ping-of-death | teardrop } action { drop | logging } *
undo signature detect { ip-option-abnormal | ping-of-death | teardrop }
signature detect icmp-type { icmp-type-value | address-mask-reply | address-mask-request | destination-unreachable | echo-reply | echo-request | information-reply | information-request | parameter-problem | redirect | source-quench | time-exceeded | timestamp-reply | timestamp-request } [ action { { drop | logging } * | none } ]
undo signature detect icmp-type { icmp-type-value | address-mask-reply | address-mask-request | destination-unreachable | echo-reply | echo-request | information-reply | information-request | parameter-problem | redirect | source-quench | time-exceeded | timestamp-reply | timestamp-request }
signature detect icmpv6-type { icmpv6-type-value | destination-unreachable | echo-reply | echo-request | group-query | group-reduction | group-report | packet-too-big | parameter-problem | time-exceeded } [ action { { drop | logging } * | none } ]
undo signature detect icmpv6-type { icmpv6-type-value | destination-unreachable | echo-reply | echo-request | group-query | group-reduction | group-report | packet-too-big | parameter-problem | time-exceeded }
signature detect ip-option { option-code | internet-timestamp | loose-source-routing | record-route | route-alert | security | stream-id | strict-source-routing } [ action { { drop | logging } * | none } ]
undo signature detect ip-option { option-code | internet-timestamp | loose-source-routing | record-route | route-alert | security | stream-id | strict-source-routing }
signature detect ipv6-ext-header ext-header-value [ action { { drop | logging } * | none } ]
undo signature detect ipv6-ext-header next-header-value
Default
Signature detection is disabled for all single-packet attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
fraggle: Specifies the fraggle attack.
fragment: Specifies the IP fragment attack.
icmp-type: Specifies an ICMP packet attack by the packet type. You can specify the packet type by a number or a keyword:
· icmp-type-value: Specifies the ICMP packet type in the range of 0 to 255.
· address-mask-reply: Specifies the ICMP address mask reply type.
· address-mask-request: Specifies the ICMP address mask request type.
· destination-unreachable: Specifies the ICMP destination unreachable type.
· echo-reply: Specifies the ICMP echo reply type.
· echo-request: Specifies the ICMP echo request type.
· information-reply: Specifies the ICMP information reply type.
· information-request: Specifies the ICMP information request type.
· parameter-problem: Specifies the ICMP parameter problem type.
· redirect: Specifies the ICMP redirect type.
· source-quench: Specifies the ICMP source quench type.
· time-exceeded: Specifies the ICMP time exceeded type.
· timestamp-reply: Specifies the ICMP timestamp reply type.
· timestamp-request: Specifies the ICMP timestamp request type.
icmpv6-type: Specifies an ICMPv6 packet attack by the packet type. You can specify the packet type by a number or a keyword:
· icmpv6-type-value: Specifies the ICMPv6 packet type in the range of 0 to 255.
· destination-unreachable: Specifies the ICMPv6 destination unreachable type.
· echo-reply: Specifies the ICMPv6 echo reply type.
· echo-request: Specifies the ICMPv6 echo request type.
· group-query: Specifies the ICMPv6 group query type.
· group-reduction: Specifies the ICMPv6 group reduction type.
· group-report: Specifies the ICMPv6 group report type.
· packet-too-big: Specifies the ICMPv6 packet too big type.
· parameter-problem: Specifies the ICMPv6 parameter problem type.
· time-exceeded: Specifies the ICMPv6 time exceeded type.
impossible: Specifies the IP impossible packet attack.
ip-option: Specifies an IP option. You can specify the IP option by a number or a keyword:
· option-code: Specifies the IP option in the range of 0 to 255.
· internet-timestamp: Specifies the timestamp option.
· loose-source-routing: Specifies the loose source routing option.
· record-route: Specifies the record route option.
· route-alert: Specifies the route alert option.
· security: Specifies the security option.
· stream-id: Specifies the stream identifier option.
· strict-source-routing: Specifies the strict source route option.
ip-option-abnormal: Specifies the abnormal IP option attack.
ipv6-ext-header ext-header-value: Specifies an IPv6 extension header by its value in the range of 0 to 255.
land: Specifies the Land attack.
large-icmp: Specifies the large ICMP packet attack.
large-icmpv6: Specifies the large ICMPv6 packet attack.
ping-of-death: Specifies the ping-of-death attack.
smurf: Specifies the smurf attack.
snork: Specifies the UDP snork attack.
tcp-all-flags: Specifies the attack where the TCP packet has all flags set.
tcp-fin-only: Specifies the attack where the TCP packet has only the FIN flag set.
tcp-invalid-flags: Specifies the attack that uses TCP packets with invalid flags.
tcp-null-flag: Specifies the attack where the TCP packet has no flags set.
tcp-syn-fin: Specifies the attack where the TCP packet has both SYN and FIN flags set.
teardrop: Specifies the teardrop attack.
tiny-fragment: Specifies the tiny fragment attack.
traceroute: Specifies the traceroute attack.
udp-bomb: Specifies the UDP bomb attack.
winnuke: Specifies the WinNuke attack.
action: Specifies the actions against the single-packet attack. If you do not specify this keyword, the default action of the attack level to which the single-packet attack belongs is used.
drop: Drops packets that match the specified signature.
logging: Enables logging for the specified single-packet attack.
none: Takes no action.
Usage guidelines
You can use this command multiple times to enable signature detection for multiple single-packet attack types.
When you specify a packet type by a number, if the packet type has a corresponding keyword, the keyword is displayed in command output. If the packet type does not have a corresponding keyword, the number is displayed.
Examples
# Enable signature detection for the IP fragment attack and specify the prevention action as drop in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] signature detect fragment action drop
Related commands
signature level action
signature level action
Use signature level action to specify the actions against single-packet attacks on a specific level.
Use undo signature level action to restore the default.
Syntax
signature level { high | info | low | medium } action { { drop | logging } * | none }
undo signature level { high | info | low | medium } action
Default
For informational-level and low-level single-packet attacks, the action is logging.
For medium-level and high-level single-packet attacks, the actions are logging and drop.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
high: Specifies the high level. None of the currently supported single-packet attacks belongs to this level.
info: Specifies the informational level. For example, large ICMP packet attack is on this level.
low: Specifies the low level. For example, the traceroute attack is on this level.
medium: Specifies the medium level. For example, the WinNuke attack is on this level.
drop: Drops packets that match the specified level.
logging: Enable logging for single-packet attacks on the specified level.
none: Takes no action.
Usage guidelines
According to their severity, single-packet attacks are divided into four levels: info, low, medium, and high. Enabling signature detection for a specific level enables signature detection for all single-packet attacks on that level.
If you enable signature detection for a single-packet attack also by using the signature detect command, action parameters in the signature detect command take effect.
Examples
# Specify the action against informational-level single-packet attacks as drop in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy 1
[Sysname-attack-defense-policy-1] signature level info action drop
Related commands
signature detect
signature level detect
signature level detect
Use signature level detect to enable signature detection for single-packet attacks on a specific level.
Use undo signature level detect to disable signature detection for single-packet attacks on a specific level.
Syntax
signature level { high | info | low | medium } detect
undo signature level { high | info | low | medium } detect
Default
Signature detection is disabled for all levels of single-packet attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
high: Specifies the high level. None of the currently supported single-packet attacks belongs to this level.
info: Specifies the informational level. For example, large ICMP packet attack is on this level.
low: Specifies the low level. For example, the traceroute attack is on this level.
medium: Specifies the medium level. For example, the WinNuke attack is on this level.
Usage guidelines
According to their severity, single-packet attacks are divided into four levels: info, low, medium, and high. Enabling signature detection for a specific level enables signature detection for all single-packet attacks on that level. Use the signature level action command to specify the actions against single-packet attacks on a specific level. If you enable signature detection for a single-packet attack also by using the signature detect command, action parameters in the signature detect command take effect.
To display the level to which a single-packet attack belongs, use the display attack-defense policy command.
Examples
# Enable signature detection for informational-level single-packet attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy 1
[Sysname-attack-defense-policy-1] signature level info detect
Related commands
display attack-defense policy
signature detect
signature level action
syn-ack-flood action
Use syn-ack-flood action to specify global actions against SYN-ACK flood attacks.
Use undo syn-ack-flood action to restore the default.
Syntax
syn-ack-flood action { drop | logging }*
undo syn-ack-flood action
Default
No global action is specified for SYN-ACK flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent SYN-ACK packets destined for the victim IP addresses.
logging: Enables logging for SYN-ACK flood attack events.
Examples
# Specify drop as the global action against SYN-ACK flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-ack-flood action drop
Related commands
syn-ack-flood detect
syn-ack-flood detect non-specific
syn-ack-flood threshold
syn-ack-flood detect
Use syn-ack-flood detect to configure IP address-specific SYN-ACK flood attack detection.
Use undo syn-ack-flood detect to remove the IP address-specific SYN-ACK flood attack detection configuration.
Syntax
Default
IP address-specific SYN-ACK flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ip ipv4-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be 255.255.255.255 or 0.0.0.0.
ipv6 ipv6-address: Specifies the IPv6 address to be protected.
threshold threshold-value: Specifies the threshold for triggering SYN-ACK flood attack prevention. The value range is 1 to 1000000 in units of SYN-ACK packets sent to the specified IP address per second.
action: Specifies the actions when a SYN-ACK flood attack is detected. If no action is specified, the global actions set by the syn-ack-flood action command apply.
drop: Drops subsequent SYN-ACK packets destined for the protected IP address.
logging: Enables logging for SYN-ACK flood attack events.
none: Takes no action.
Usage guidelines
With SYN-ACK flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of SYN-ACK packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure SYN-ACK flood attack detection for multiple IP addresses in one attack defense policy.
Examples
# Configure SYN-ACK flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-ack-flood detect ip 192.168.1.2 threshold 2000
Related commands
syn-ack-flood action
syn-ack-flood detect non-specific
syn-ack-flood threshold
syn-ack-flood detect non-specific
Use syn-ack-flood detect non-specific to enable global SYN-ACK flood attack detection.
Use undo syn-ack-flood detect non-specific to disable global SYN-ACK flood attack detection.
Syntax
syn-ack-flood detect non-specific
undo syn-ack-flood detect non-specific
Default
Global SYN-ACK flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global SYN-ACK flood attack detection applies to all IP addresses except for those specified by the syn-ack-flood detect command. The global detection uses the global trigger threshold set by the syn-ack-flood threshold command and global actions specified by the syn-ack-flood action command.
Examples
# Enable global SYN-ACK flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-ack-flood detect non-specific
Related commands
syn-ack-flood action
syn-ack-flood detect
syn-ack-flood threshold
syn-ack-flood threshold
Use syn-ack-flood threshold to set the global threshold for triggering SYN-ACK flood attack prevention.
Use undo syn-ack-flood threshold to restore the default.
Syntax
syn-ack-flood threshold threshold-value
undo syn-ack-flood threshold
Default
The global threshold is 1000 for triggering SYN-ACK flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of SYN-ACK packets sent to an IP address per second.
Usage guidelines
With global SYN-ACK flood attack detection configured, the device is in attack detection state. When the sending rate of SYN-ACK packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global SYN-ACK flood attack detection. Adjust the threshold according to the application scenarios. If the number of SYN-ACK packets sent to a protected server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering SYN-ACK flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-ack-flood threshold 100
Related commands
syn-ack-flood action
syn-ack-flood detect
syn-ack-flood detect non-specific
syn-flood action
Use syn-flood action to specify global actions against SYN flood attacks.
Use undo syn-flood action to restore the default.
Syntax
syn-flood action { drop | logging } *
undo syn-flood action
Default
No global action is specified for SYN flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent SYN packets destined for the victim IP addresses.
logging: Enables logging for SYN flood attack events.
Examples
# Specify drop as the global action against SYN flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-flood action drop
Related commands
syn-flood detect
syn-flood detect non-specific
syn-flood threshold
syn-flood detect
Use syn-flood detect to configure IP address-specific SYN flood attack detection.
Use undo syn-flood detect to remove the IP address-specific SYN flood attack detection configuration.
Syntax
syn-flood detect { ip ipv4-address | ipv6 ipv6-address } [ threshold threshold-value ] [ action { { drop | logging } * | none } ]
undo syn-flood detect { ip ipv4-address | ipv6 ipv6-address }
Default
IP address-specific SYN flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ip ipv4-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be 255.255.255.255 or 0.0.0.0.
ipv6 ipv6-address: Specifies the IPv6 address to be protected.
threshold threshold-value: Specifies the threshold for triggering SYN flood attack prevention. The value range is 1 to 1000000 in units of SYN packets sent to the specified IP address per second.
action: Specifies the actions when a SYN flood attack is detected. If no action is specified, the global actions set by the syn-flood action command apply.
drop: Drops subsequent SYN packets destined for the protected IP address.
logging: Enables logging for SYN flood attack events.
none: Takes no action.
Usage guidelines
With SYN flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of SYN packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure SYN flood attack detection for multiple IP addresses in one attack defense policy.
Examples
# Configure SYN flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-flood detect ip 192.168.1.2 threshold 2000
Related commands
syn-flood action
syn-flood detect non-specific
syn-flood threshold
syn-flood detect non-specific
Use syn-flood detect non-specific to enable global SYN flood attack detection.
Use undo syn-flood detect non-specific to disable global SYN flood attack detection.
Syntax
syn-flood detect non-specific
undo syn-flood detect non-specific
Default
Global SYN flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global SYN flood attack detection applies to all IP addresses except for those specified by the syn-flood detect command. The global detection uses the global trigger threshold set by the syn-flood threshold command and global actions specified by the syn-flood action command.
Examples
# Enable global SYN flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-flood detect non-specific
Related commands
syn-flood action
syn-flood detect
syn-flood threshold
syn-flood threshold
Use syn-flood threshold to set the global threshold for triggering SYN flood attack prevention.
Use undo syn-flood threshold to restore the default.
Syntax
syn-flood threshold threshold-value
undo syn-flood threshold
Default
The global threshold is 1000 for triggering SYN flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of SYN packets sent to an IP address per second.
Usage guidelines
With global SYN flood attack detection configured, the device is in attack detection state. When the sending rate of SYN packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global SYN flood attack detection. Adjust the threshold according to the application scenarios. If the number of SYN packets sent to a protected server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering SYN flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-flood threshold 100
Related commands
syn-flood action
syn-flood detect
syn-flood detect non-specific
udp-flood action
Use udp-flood action to specify global actions against UDP flood attacks.
Use undo udp-flood action to restore the default.
Syntax
udp-flood action { drop | logging } *
undo udp-flood action
Default
No global action is specified for UDP flood attacks.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
drop: Drops subsequent UDP packets destined for the victim IP addresses.
logging: Enables logging for UDP flood attack events.
Examples
# Specify drop as the global action against UDP flood attacks in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] udp-flood action drop
Related commands
udp-flood detect
udp-flood detect non-specific
udp-flood threshold
udp-flood detect
Use udp-flood detect to configure IP address-specific UDP flood attack detection.
Use undo udp-flood detect to remove the IP address-specific UDP flood attack detection configuration.
Syntax
udp-flood detect { ip ipv4-address | ipv6 ipv6-address } [ threshold threshold-value ] [ action { { drop | logging } * | none } ]
undo udp-flood detect { ip ipv4-address | ipv6 ipv6-address }
Default
IP address-specific UDP flood attack detection is not configured.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
ip ipv4-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be 255.255.255.255 or 0.0.0.0.
ipv6 ipv6-address: Specifies the IPv6 address to be protected.
threshold threshold-value: Specifies the threshold for triggering UDP flood attack prevention. The value range is 1 to 64000 in units of UDP packets sent to the specified IP address per second.
action: Specifies the actions when a UDP flood attack is detected. If no action is specified, the global actions set by the udp-flood action command apply.
drop: Drops subsequent UDP packets destined for the protected IP address.
logging: Enables logging for UDP flood attack events.
none: Takes no action.
Usage guidelines
With UDP flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of UDP packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure UDP flood attack detection for multiple IP addresses in one attack defense policy.
Examples
# Configure UDP flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] udp-flood detect ip 192.168.1.2 threshold 2000
Related commands
udp-flood action
udp-flood detect non-specific
udp-flood threshold
udp-flood detect non-specific
Use udp-flood detect non-specific to enable global UDP flood attack detection.
Use undo udp-flood detect non-specific to disable global UDP flood attack detection.
Syntax
udp-flood detect non-specific
undo udp-flood detect non-specific
Default
Global UDP flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
Usage guidelines
The global UDP flood attack detection applies to all IP addresses except for those specified by the udp-flood detect command. The global detection uses the global trigger threshold set by the udp-flood threshold command and global actions specified by the udp-flood action command.
Examples
# Enable global UDP flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] udp-flood detect non-specific
Related commands
udp-flood action
udp-flood detect
udp-flood threshold
udp-flood threshold
Use udp-flood threshold to set the global threshold for triggering UDP flood attack prevention.
Use undo udp-flood threshold to restore the default.
Syntax
udp-flood threshold threshold-value
undo udp-flood threshold
Default
The global threshold is 1000 for triggering UDP flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 64000 in units of UDP packets sent to an IP address per second.
Usage guidelines
With global UDP flood attack detection configured, the device is in attack detection state. When the sending rate of UDP packets to an IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.
The global threshold applies to global UDP flood attack detection. Adjust the threshold according to the application scenarios. If the number of UDP packets sent to a protected server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering UDP flood attack prevention in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] rst-flood threshold 100
Related commands
udp-flood action
udp-flood detect
udp-flood detect non-specific
