Login
- Table of Contents
-
- 04 Layer 3 - IP Services Command Reference
- 00-Preface
- 01-ARP commands
- 02-IP addressing commands
- 03-DHCP commands
- 04-DNS commands
- 05-IP forwarding basics commands
- 06-Fast forwarding commands
- 07-IRDP commands
- 08-IP performance optimization commands
- 09-UDP Helper commands
- 10-IPv6 basics commands
- 11-DHCPv6 commands
- 12-IPv6 fast forwarding commands
- 13-Tunnel commands
- 14-GRE commands
- Related Documents
-
| Title | Size | Download |
|---|---|---|
| 04-DNS commands | 157.53 KB |
display dns domain
Use display dns domain to display the domain name suffixes.
Syntax
display dns domain [ dynamic ] [ vpn-instance vpn-instance-name ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
dynamic: Displays the domain name suffixes dynamically obtained through DHCP or other protocols. If you do not specify this keyword, the command displays the statically configured and dynamically obtained domain name suffixes.
vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. To display domain name suffixes on the public network, do not use this option.
Examples
# Display domain name suffixes on the public network.
<Sysname> display dns domain
Type:
D: Dynamic S: Static
No. Type Domain suffix
1 S com
Table 1 Command output
|
Field |
Description |
|
No. |
Sequence number. |
|
Type |
Domain name suffix type: · S—A statically configured domain name suffix. · D—A domain name suffix dynamically obtained through DHCP or other protocols. |
|
Domain suffix |
Domain name suffixes. |
dns domain
display dns host
Use display dns host to display information about domain name-to-IP address mappings.
Syntax
display dns host [ ip | ipv6 ] [ vpn-instance vpn-instance-name ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
ip: Specifies type A queries. A type A query resolves a domain name to the mapped IPv4 address.
ipv6: Specifies type AAAA queries. A type AAAA query resolves a domain name to the mapped IPv6 address.
vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. To display domain name-to-IP address mappings for the public network, do not use this option.
Usage guidelines
If you do not specify the ip and ipv6 keywords, this command displays domain name-to-IP address mappings of all query types.
Examples
# Display domain name-to-IP address mappings of all query types.
<Sysname> display dns host
Type:
D: Dynamic S: Static
Total number: 3
No. Host name Type TTL Query type IP addresses
1 sample.com D 3132 A 192.168.10.1
192.168.10.2
192.168.10.3
2 zig.sample.com S - A 192.168.1.1
3 sample.net S - AAAA FE80::4904:4448
Table 2 Command output
|
Field |
Description |
|
|
No. |
Sequence number. |
|
|
Host name |
Domain name. |
|
|
Type |
Domain name-to-IP address mapping type: · S—A static mapping configured by the ip host or ipv6 host command. · D—A mapping dynamically obtained through dynamic domain name resolution. |
|
|
TTL |
Time in seconds that a mapping can be stored in the cache. For a static mapping, a hyphen (-) is displayed. |
|
|
Query type |
Query type, type A or type AAAA. |
|
|
IP addresses |
Replied IP address: · For type A query, the replied IP address is an IPv4 address. · For type AAAA query, the replied IP address is an IPv6 address. |
|
· ip host
· ipv6 host
· reset dns host
display dns server
Use display dns server to display IPv4 DNS server information.
Syntax
display dns server [ dynamic ] [ vpn-instance vpn-instance-name ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
dynamic: Displays IPv4 DNS server information dynamically obtained through DHCP or other protocols. If you do not specify this keyword, the command displays statically configured and dynamically obtained IPv4 DNS server addresses.
vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. To display IPv4 DNS server information for the public network, do not use this option.
Examples
# Display IPv4 DNS server information about the public network.
<Sysname> display dns server
Type:
D: Dynamic S: Static
No. Type IP address
1 S 202.114.0.124
2 S 169.254.65.125
Table 3 Command output
|
Field |
Description |
|
|
No. |
Sequence number. |
|
|
Type |
DNS server type: · S—A manually configured DNS server. · D—DNS server information dynamically obtained through DHCP or other protocols. |
|
|
IP address |
IPv4 address of the DNS server. |
|
Related commands
dns server
display ipv6 dns server
Use display ipv6 dns server to display IPv6 DNS server information.
Syntax
display ipv6 dns server [ dynamic ] [ vpn-instance vpn-instance-name ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
dynamic: Displays IPv6 DNS server information dynamically obtained through DHCP or other protocols. If you do not specify this keyword, the command displays the statically configured and dynamically obtained IPv6 DNS server information.
vpn-instance vpn-instance-name : Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. To display IPv6 DNS server information for the public network, do not use this option.
Examples
# Display IPv6 DNS server information about the public network.
<Sysname> display ipv6 dns server
Type:
D: Dynamic S: Static
No. Type IPv6 address Outgoing Interface
1 S 2::2
Table 4 Command output
|
Field |
Description |
|
No. |
Sequence number. |
|
Type |
DNS server type: · S—A manually configured DNS server. · D—DNS server information dynamically obtained through DHCP or other protocols. |
|
IPv6 address |
IPv6 address of the DNS server. |
|
Outgoing Interface |
Output interface. |
Related commands
ipv6 dns server
dns domain
Use dns domain to configure a domain name suffix.
Use undo dns domain to delete the specified domain name suffix.
Syntax
dns domain domain-name [ vpn-instance vpn-instance-name ]
undo dns domain domain-name [ vpn-instance vpn-instance-name ]
Default
No domain name suffix is configured. Only the provided domain name is resolved.
Views
System view
Predefined user roles
network-admin
Parameters
domain-name: Specifies a domain name suffix. It is a dot-separated, case-insensitive string that can include letters, digits, hyphens (-), underscores (_), and dots (.), for example, aabbcc.com. The domain name suffix can include at most 253 characters, and each separated string includes no more than 63 characters.
vpn-instance vpn-instance-name: Specifies the name of an MPLS L3VPN instance, a case-sensitive string of 1 to 31 characters. To specify a domain name suffix on the public network, do not use this option.
Usage guidelines
A domain name suffix applies to both IPv4 DNS and IPv6 DNS.
You can specify the following:
· Domain name suffixes for the public network and up to 1024 VPNs.
· A maximum of 16 domain name suffixes for the public network or each VPN.
The system automatically adds the suffixes in the order they are configured to the domain name string received from a host for resolution.
Examples
# Configure the domain name suffix com for the public network.
<Sysname> system-view
[Sysname] dns domain com
display dns domain
dns dscp
Use dns dscp to set the DSCP value for DNS packets sent by a DNS client or DNS proxy.
Use undo dns dscp to restore the default.
Syntax
dns dscp dscp-value
undo dns dscp
Default
The DSCP value in DNS packets is 0.
Views
System view
Predefined user roles
network-admin
Parameters
dscp-value: Sets the DSCP value for outgoing DNS packets, in the range of 0 to 63.
Usage guidelines
The DSCP value of a packet specifies the priority level of the packet and affects the transmission priority of the packet. A bigger DSCP value represents a higher priority.
Examples
# Set the DSCP value for outgoing DNS packets to 30.
<Sysname> system-view
[Sysname] dns dscp 30
dns proxy enable
Use dns proxy enable to enable DNS proxy.
Use undo dns proxy enable to restore the default.
Syntax
dns proxy enable
undo dns proxy enable
Default
DNS proxy is disabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
This configuration applies to both IPv4 DNS and IPv6 DNS.
Examples
# Enable DNS proxy.
<Sysname> system-view
[Sysname] dns proxy enable
dns server
Use dns server to specify the IPv4 address of a DNS server.
Use undo dns server to remove the specified IPv4 address of a DNS server. If you do not specify an IPv4 address, the undo dns server command removes all DNS server IPv4 addresses on the public network or the specified VPN.
Syntax
dns server ip-address [ vpn-instance vpn-instance-name ]
undo dns server [ ip-address ] [ vpn-instance vpn-instance-name ]
Default
No DNS server is specified.
Views
System view
Predefined user roles
network-admin
Parameters
ip-address: Specifies an IPv4 address of a DNS server.
vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. To specify an IPv4 address on the public network, do not use this option.
Usage guidelines
The device sends DNS query request to the DNS servers in the order their IPv4 addresses are specified.
You can specify the following:
· DNS server IPv4 addresses for the public network and up to 1024 VPNs.
· A maximum of six DNS server IPv4 addresses for the public network or each VPN.
Examples
# Specify the IPv4 address of a DNS server as 172.16.1.1.
<Sysname> system-view
[Sysname] dns server 172.16.1.1
Related commands
display dns server
dns source-interface
Use dns source-interface to specify the source interface for DNS packets.
Use undo dns source-interface to restore the default.
Syntax
dns source-interface interface-type interface-number [ vpn-instance vpn-instance-name ]
undo dns source-interface interface-type interface-number [ vpn-instance vpn-instance-name ]
Default
No source interface for DNS packets is specified. The device uses the primary IP address of the output interface of the matching route as the source IP address for a DNS request.
Views
System view
Predefined user roles
network-admin
Parameters
interface-type interface-number: Specifies an interface by its type and number.
vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. To specify a source interface on the public network, do not use this option.
Usage guidelines
This configuration applies to both IPv4 and IPv6.
· In IPv4 DNS, the device uses the primary IPv4 address of the specified source interface as the source IP address of DNS query.
· In IPv6 DNS, the device follows the procedure defined in RFC 3484 to select an IPv6 address of the source interface as the source IP address for DNS query.
If you use the command multiple times, the most recent configuration takes effect.
You can specify the following:
· Source interfaces for the public network and a maximum of 1024 VPNs.
· Only one source interface for the public network or each VPN.
Make sure the specified interface is on the VPN specified by the vpn-instance vpn-instance-name option.
Examples
# Specify VLAN-interface 2 as the source interface for DNS packets on the public network.
<Sysname> system-view
[Sysname] dns source-interface vlan-interface 2
dns spoofing
Use dns spoofing to enable DNS spoofing and specify the IPv4 address to spoof DNS query requests.
Use undo dns spoofing to disable DNS spoofing.
Syntax
dns spoofing ip-address [ vpn-instance vpn-instance-name ]
undo dns spoofing ip-address [ vpn-instance vpn-instance-name ]
Default
DNS spoofing is disabled.
Views
System view
Predefined user roles
network-admin
Parameters
ip-address: Specifies the IPv4 address used to spoof name query requests.
vpn-instance vpn-instance-name: Specifies the name of an MPLS L3VPN instance, a case-sensitive string of 1 to 31 characters. To enable DNS spoofing function on the public network, do not use this option.
Usage guidelines
Use the dns spoofing command together with the dns proxy enable command. DNS spoofing enables the DNS proxy to send a spoofed reply with a configured IP address even if it cannot reach the DNS server because no dial-up connection is available. Without DNS spoofing, the proxy does not answer or forward a DNS request if it cannot find a local matching DNS entry or reach the DNS server.
You can configure DNS spoofing for the public network and a maximum of 1024 VPNs. You can specify only one replied IPv4 address on the DNS spoofing device for the public network or each VPN.
If you use the command multiple times, the most recent configuration takes effect.
Examples
# Enable DNS spoofing on the public network and specify the IPv4 address 1.1.1.1 to spoof DNS requests.
<Sysname> system-view
[Sysname] dns proxy enable
[Sysname] dns spoofing 1.1.1.1
Related commands
dns proxy enable
dns trust-interface
Use dns trust-interface to specify the DNS trusted interface.
Use undo dns trust-interface to remove the specified DNS trusted interface. If you do not specify an interface, the undo dns trust-interface command removes all DNS trusted interfaces.
Syntax
dns trust-interface interface-type interface-number
undo dns trust-interface [ interface-type interface-number ]
Default
No trusted interface is specified.
Views
System view
Predefined user roles
network-admin
Parameters
interface-type interface-number: Specifies an interface by its type and number.
Usage guidelines
By default, an interface obtains DNS suffix and DNS server information from DHCP. A network attacker might act as the DHCP server to assign a wrong DNS suffix and DNS server address to the device. As a result, the device fails to obtain the resolved IP address or might get the wrong IP address. With the DNS trusted interface specified, the device only uses the DNS suffix and DNS server information obtained through the trusted interface to avoid attack.
This configuration is applicable to both IPv4 and IPv6.
You can configure up to 128 DNS trusted interfaces on the device.
Examples
# Specify VLAN-interface 2 as the DNS trusted interface.
<Sysname> system-view
[Sysname] dns trust-interface vlan-interface 2
ip host
Use ip host to create a host name-to-IPv4 address mapping.
Use undo ip host to remove a mapping.
Syntax
ip host host-name ip-address [ vpn-instance vpn-instance-name ]
undo ip host host-name ip-address [ vpn-instance vpn-instance-name ]
Default
No mappings are created.
Views
System view
Predefined user roles
network-admin
Parameters
host-name: Specifies a host name, a case-insensitive string of 1 to 253 characters. It can include letters, digits, hyphens (-), underscores (_), and dots (.).
ip-address: Specifies the IPv4 address of the host.
vpn-instance vpn-instance-name: Specifies the name of an MPLS L3VPN instance, a case-sensitive string of 1 to 31 characters. To specify a host name-to-IP address mapping on the public network, do not specify this option.
Usage guidelines
You can configure the following:
· Host name-to-IPv4 address mappings for the public network and up to 1024 VPNs.
· A maximum of 1024 host name-to-IPv4 address mappings for the public network or each VPN.
On the public network or a VPN, each host name maps only to one IPv4 address. If you use the command multiple times, the most recent configuration takes effect.
Exclude the ping command parameters ip, -a, -c, -f, -h, -i, -m, -n, -p, -q, -r, -s, -t, -tos, -v, and -vpn-instance from the host name. For more information about the ping command parameters, see Network Management and Monitoring.
Examples
# Map the IPv4 address 10.110.0.1 to the host name aaa on the public network.
<Sysname> system-view
[Sysname] ip host aaa 10.110.0.1
display dns host
ipv6 dns dscp
Use ipv6 dns dscp to set the DSCP value for IPv6 DNS packets sent by an IPv6 DNS client or DNS proxy.
Use undo ipv6 dns dscp to restore the default.
Syntax
ipv6 dns dscp dscp-value
undo ipv6 dns dscp
Default
The DSCP value for IPv6 DNS packets is 0.
Views
System view
Predefined user roles
network-admin
Parameters
dscp-value: Sets the DSCP value for outgoing IPv6 DNS packets, in the range of 0 to 63.
Usage guidelines
The DSCP value of a packet specifies the priority level of the packet and affects the transmission priority of the packet. A bigger DSCP value represents a higher priority.
Examples
# Set the DSCP value for outgoing IPv6 DNS packets to 30.
<Sysname> system-view
[Sysname] ipv6 dns dscp 30
ipv6 dns server
Use ipv6 dns server to specify the IPv6 address of a DNS server.
Use undo ipv6 dns server to remove the specified DNS server IPv6 address. If you do not specify an IPv6 address, the undo ipv6 dns server command removes all DNS server IPv6 addresses on the public network or the specified VPN.
Syntax
ipv6 dns server ipv6-address [ interface-type interface-number ] [ vpn-instance vpn-instance-name ]
undo ipv6 dns server [ ipv6-address [ interface-type interface-number ] ] [ vpn-instance vpn-instance-name ]
Default
No DNS server IPv6 address is specified.
Views
System view
Predefined user roles
network-admin
Parameters
ipv6-address: Specifies the IPv6 address of a DNS server.
interface-type interface-number: Specifies the output interface by its type and number. If you do not specify an interface, the device forwards DNS packets out of the output interface of the matching route. You must specify the output interface when the IPv6 address of the DNS server is a link-local address.
vpn-instance vpn-instance-name: Specifies the name of an MPLS L3VPN instance, a case-sensitive string of 1 to 31 characters. To specify a DNS server IPv6 address on the public network, do not use this option.
Usage guidelines
For dynamic DNS, the device sends DNS query request to the IPv6 DNS servers in the order their IPv6 addresses are specified.
You can specify the following:
· DNS server IPv6 addresses for the public network and up to 1024 VPNs.
· A maximum of six DNS server IPv6 addresses for the public network or each VPN.
Examples
# Specify the DNS server IPv6 address as 2002::1 for the public network.
<Sysname> system-view
[Sysname] ipv6 dns server 2002::1
Related commands
display ipv6 dns server
ipv6 dns spoofing
Use ipv6 dns spoofing to enable DNS spoofing and specify the translated IPv6 address.
Use undo ipv6 dns spoofing to disable DNS spoofing.
Syntax
ipv6 dns spoofing ipv6-address [ vpn-instance vpn-instance-name ]
undo ipv6 dns spoofing ipv6-address [ vpn-instance vpn-instance-name ]
Default
DNS spoofing is disabled.
Views
System view
Predefined user roles
network-admin
Parameters
ipv6-address: Specifies the IPv6 address used to spoof name query requests.
vpn-instance vpn-instance-name: Specifies the name of an MPLS L3VPN instance, a case-sensitive string of 1 to 31 characters. To enable DNS spoofing function on the public network, do not use this option.
Usage guidelines
Use the ipv6 dns spoofing command together with the dns proxy enable command.
DNS spoofing enables the DNS proxy on the device to send a spoofed reply with an IPv6 address in response to a type AAAA DNS request. Without DNS spoofing, the device does not forward or answer a request if no DNS server is specified or no DNS server is reachable.
You can configure DNS spoofing for the public network and a maximum of 1024 VPNs. You can specify only one replied IPv6 address for the public network or each VPN.
If you use the command multiple times, the most recent configuration takes effect.
Examples
# Enable DNS spoofing on the public network and specify 2001::1 as the translated IPv6 address.
<Sysname> system-view
[Sysname] dns proxy enable
[Sysname] ipv6 dns spoofing 2001::1
Related commands
dns proxy enable
ipv6 host
Use ipv6 host to create a host name-to-IPv6 address mapping.
Use undo ipv6 host to remove a mapping.
Syntax
ipv6 host host-name ipv6-address [ vpn-instance vpn-instance-name ]
undo ipv6 host host-name ipv6-address [ vpn-instance vpn-instance-name ]
Default
No mappings are created.
Views
System view
Predefined user roles
network-admin
Parameters
host-name: Specifies a host name, a case-insensitive string of 1 to 253 characters. It can include letters, digits, hyphens (-), underscores (_), and dots (.).
ipv6-address: Specifies the IPv6 address of the host.
vpn-instance vpn-instance-name: Specifies the name of an MPLS L3VPN instance, a case-sensitive string of 1 to 31 characters. To create a host name-to-IPv6 address mapping on the public network, do not use this option.
Usage guidelines
You can configure the following:
· Host name-to-IPv6 address mappings for the public network and up to 1024 VPNs.
· A maximum of 1024 host name-to-IPv6 address mappings for the public network or each VPN.
For the public network or a VPN, each host name maps only to one IPv6 address. If you use the command multiple times, the most recent configuration takes effect.
Exclude the ping ipv6 command parameters -a, -c, -i, -m, -q, -s, -t, -tc, -v, and -vpn-instance from the host name. For more information about the ping ipv6 command parameters, see Network Management and Monitoring.
Examples
# Map IPv6 address 2001::1 to host name aaa on the public network.
<Sysname> system-view
[Sysname] ipv6 host aaa 2001::1
Related commands
ip host
reset dns host
Use reset dns host to clear information about the dynamic DNS cache.
Syntax
reset dns host [ ip | ipv6 ] [ vpn-instance vpn-instance-name ]
Views
User view
Predefined user roles
network-admin
Parameters
ip: Specifies type A queries. A type A query resolves a domain name to the mapped IPv4 address.
ipv6: Specifies type AAAA queries. A type AAAA query resolves a domain name to the mapped IPv6 address.
vpn-instance vpn-instance-name: Specifies the name of an MPLS L3VPN instance, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN, this command clears the domain name-to-IPv6 address mapping on the public network.
Usage guidelines
If you do not specify the ip and ipv6 keywords, the reset dns host command clears dynamic DNS cache information about all query types.
Examples
# Clear dynamic DNS cache information about all query types on the public network.
<Sysname> reset dns host
Related commands
display dns host
The term "interface" in this chapter collectively refers to Layer 3 interfaces, including VLAN interfaces and Layer 3 Ethernet interfaces. You can set an Ethernet port as a Layer 3 interface by using the port link-mode route command (see Layer 2—LAN Switching Configuration Guide).
ddns apply policy
Use ddns apply policy to apply the specified DDNS policy to the interface, update the mapping between the specified FQDN and the primary IP address of the interface, and enable DDNS update.
Use undo ddns apply policy to remove the DDNS policy applied to the interface and stop DDNS update.
Syntax
ddns apply policy policy-name [ fqdn domain-name ]
undo ddns apply policy policy-name
Default
No DDNS policy and FQDN for update are specified on the interface, and DDNS update is disabled.
Views
Interface view
Predefined user roles
network-admin
Parameters
policy-name: Specifies the DDNS policy name, a case-insensitive string of 1 to 32 characters.
fqdn domain-name: Specifies the FQDN to replace <h> in the URL for DDNS update. The domain-name argument specifies a case-insensitive string of 1 to 253 characters. It can include letters, digits, hyphens (-), underscores (_), and dots (.).
Usage guidelines
You can apply up to four DDNS policies to an interface.
If you use the ddns apply policy command multiple times with the same DDNS policy name but different FQDNs, both of the following occur:
· The most recent configuration takes effect.
· The device initiates a DDNS update request immediately.
Examples
# Apply the DDNS policy steven_policy to VLAN-interface 2 to update the domain name to IP address mapping for FQDN www.whatever.com and enable DDNS update.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] ddns apply policy steven_policy fqdn www.whatever.com
Related commands
· ddns policy
· display ddns policy
ddns dscp
Use ddns dscp to set the DSCP value for outgoing DDNS packets.
Use undo ddns dscp to restore the default.
Syntax
ddns dscp dscp-value
undo ddns dscp
Default
The DSCP value for outgoing DDNS packets is 0.
Views
System view
Predefined user roles
network-admin
Parameters
dscp-value: Sets the DSCP value for outgoing DDNS packets, in the range of 0 to 63.
Usage guidelines
The DSCP value of a packet specifies the priority level of the packet and affects the transmission priority of the packet. A bigger DSCP value represents a higher priority.
Examples
# Set the DSCP value for outgoing DDNS packets to 30.
<Sysname> system-view
[Sysname] ddns dscp 30
ddns policy
Use ddns policy to create a DDNS policy and enter its view.
Use undo ddns policy to delete a DDNS policy.
Syntax
ddns policy policy-name
undo ddns policy policy-name
Default
No DDNS policy is created.
Views
System view
Predefined user roles
network-admin
Parameters
policy-name: Specifies the DDNS policy name, a case-insensitive string of 1 to 32 characters.
Usage guidelines
You can create up to 16 DDNS policies on the device.
Examples
# Create a DDNS policy steven_policy and enter its view.
<Sysname> system-view
[Sysname] ddns policy steven_policy
Related commands
· ddns apply policy
display ddns policy
Use display ddns policy to display information about DDNS policies.
Syntax
display ddns policy [ policy-name ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
policy-name: Specifies the DDNS policy name, a case-insensitive string of 1 to 32 characters. If you do not specify a DDNS policy, this command displays information about all DDNS policies.
Examples
# Display information about the DDNS policy steven_policy.
<Sysname> display ddns policy steven_policy
DDNS policy: steven_policy
URL : http://members.3322.org/dyndns/update?
system=dyndns&hostname=<h>&myip=<a>
Username : steven
Password : ******
Method : GET
SSL client policy:
Interval : 1 days 0 hours 1 minutes
# Display information about all DDNS policies.
<Sysname> display ddns policy
DDNS policy: steven_policy
URL : http://members.3322.org/dyndns/update?system=
dyndns&hostname=<h>&myip=<a>
Username : steven
Password : ******
Method : GET
SSL client policy:
Interval : 0 days 0 hours 30 minutes
DDNS policy: tom-policy
URL : http://members.3322.org/dyndns/update?system=
dyndns&hostname=<h>&myip=<a>
Username :
Password :
Method : GET
SSL client policy:
Interval : 0 days 0 hours 15 minutes
DDNS policy: u-policy
URL : oray://phservice2.oray.net
Username : username
Password :
Method : -
SSL client policy:
Interval : 0 days 0 hours 15 minutes
Table 5 Command output
|
Field |
Description |
|
|
DDNS policy |
DDNS policy name. |
|
|
URL |
URL address for a DDNS update request. This field is blank if no URL address is configured. |
|
|
Username |
Username to be included in the URL address for DDNS update requests. This field is blank if no username is configured. |
|
|
Password |
Password to be included in the URL address for DDNS update requests. This field is blank if no password is configured and displays ****** if a password is configured. |
|
|
Method |
Parameter transmission method used to send HTTP/HTTPS-based DDNS update requests. Method types include GET and POST. |
|
|
SSL client policy |
Name of the associated SSL client policy. This field is blank if no SSL client policy is associated. |
|
|
Interval |
Interval for sending DDNS update requests. |
|
ddns policy
interval
Use interval to specify the interval for sending DDNS update requests after DDNS update is enabled.
Use undo interval to restore the default value.
Syntax
interval days [ hours [ minutes ] ]
undo interval
Default
The DDNS update request interval is one hour.
Views
DDNS policy view
Predefined user roles
network-admin
Parameters
days: Days in the range of 0 to 365.
hours: Hours in the range of 0 to 23.
minutes: Minutes in the range of 0 to 59.
Usage guidelines
A DDNS update request is initiated immediately after the primary IP address of the interface changes or the link state of the interface changes from down to up.
If you set the interval to 0, the device does not periodically initiate any DDNS update request. However, it initiates a DDNS update request in either of the following situations:
· When the primary IP address of the interface changes.
· When the link state of the interface changes from down to up.
If you use the interval command multiple times with different time intervals, the most recent configuration takes effect. If you change the interval for an applied DDNS policy, the device immediately initiates a DDNS update request and sets the interval as the update interval.
Examples
# Set the interval for sending DDNS update requests to one day and one minute for the DDNS policy steven_policy.
<Sysname> system-view
[Sysname] ddns policy steven_policy
[Sysname-ddns-policy-steven_policy] interval 1 0 1
· ddns policy
· display ddns policy
method
Use method to specify the parameter transmission method for sending DDNS update requests to HTTP/HTTPS-based DDNS servers.
Use undo method to restore the default.
Syntax
method { http-get | http-post }
undo method
Default
The method http-get applies.
Views
DDNS policy view
Predefined user roles
network-admin
Parameters
http-get: Uses the get operation.
http-post: Uses the post operation.
Usage guidelines
This command applies to DDNS updates in HTTP/HTTPS. If the DDNS server uses HTTP or HTTPS service, choose a parameter transmission method compatible with the DDNS server. For example, a DHS server supports the http-post method.
If the DDNS policy has been applied to an interface, a DDNS update is sent immediately after the parameter transmission is changed.
Examples
# Specify the parameter transmission method as http-post for DDNS update request for DDNS policy steven_policy.
<Sysname> system-view
[Sysname] ddns policy steven_policy
[Sysname-ddns-policy-steven_policy] method http-post
Related commands
· ddns policy
· display ddns policy
password
Use password to specify the password to be included in the URL address for DDNS update requests.
Use undo password to remove the password.
Syntax
password { cipher | simple } password
undo password
Default
No password is specified for the URL address.
Views
DDNS policy view
Predefined user roles
network-admin
Parameters
cipher: Sets a ciphertext password.
simple: Sets a plaintext password.
password: Specifies a case-sensitive password string. If simple is specified, it must be a string of 1 to 32 characters. If cipher is specified, it must be a string of 1 to 73 characters.
Usage guidelines
For security purposes, all passwords, including passwords configured in plain text, are saved in ciphertext.
Examples
# Specify the login password as nevets to be included in the URL address for update requests of DDNS policy steven_policy.
<Sysname> system-view
[Sysname] ddns policy steven_policy
[Sysname-ddns-policy-steven_policy] password simple nevets
Related commands
· ddns policy
· display ddns policy
· url
· username
ssl-client-policy
Use ssl-client-policy to associate an SSL client policy with a DDNS policy.
Use undo ssl-client-policy to cancel the association of an SSL client policy with a DDNS policy.
Syntax
ssl-client-policy policy-name
undo ssl-client-policy
Default
No SSL client policy is associated with any DDNS policy.
Views
DDNS policy view
Predefined user roles
network-admin
Parameters
policy-name: Specifies the SSL client policy name, a case-insensitive string of 1 to 31 characters.
Usage guidelines
The SSL client policy is effective only for HTTPS-based DDNS update requests.
If you use the ssl-client-policy command multiple times with different SSL client policies, the most recent configuration takes effect.
Examples
# Associate the SSL client policy ssl_policy with the DDNS policy steven_policy.
<Sysname> system-view
[Sysname] ddns policy steven_policy
[Sysname-ddns-policy-steven_policy] ssl-client-policy ssl_policy
· ddns policy
· display ddns policy
· ssl-client-policy (Security Command Reference)
url
Use url to specify the URL address for DDNS update requests.
Use undo url to delete the URL address.
Syntax
url request-url
undo url
Default
No URL address is specified for DDNS update requests.
Views
DDNS policy view
Predefined user roles
network-admin
Parameters
request-url: Specifies the URL address, a case-sensitive string of 1 to 240 characters.
Usage guidelines
The URL addresses configured for update requests vary by DDNS server. Common DDNS server URL address format are shown in Table 6.
Table 6 Common URL addresses for DDNS update request
|
DDNS server |
URL addresses for DDNS update requests |
|
www.3322.org |
http://members.3322.org/dyndns/update?system=dyndns&hostname=<h>&myip=<a> |
|
DYNDNS |
http://members.dyndns.org/nic/update?system=dyndns&hostname=<h>&myip=<a> |
|
DYNS |
http://www.dyns.cx/postscript.php?host=<h>&ip=<a> |
|
ZONEEDIT |
http://dynamic.zoneedit.com/auth/dynamic.html?host=<h>&dnsto=<a> |
|
TZO |
http://cgi.tzo.com/webclient/signedon.html?TZOName=<h>IPAddress=<a> |
|
EASYDNS |
http://members.easydns.com/dyn/ez-ipupdate.php?action=edit&myip=<a>&host_id=<h> |
|
HEIPV6TB |
http://dyn.dns.he.net/nic/update?hostname=<h>&myip=<a> |
|
CHANGE-IP |
http://nic.changeip.com/nic/update?hostname=<h>&offline=1 |
|
NO-IP |
http://dynupdate.no-ip.com/nic/update?hostname=<h>&myip=<a> |
|
DHS |
http://members.dhs.org/nic/hosts?domain=dyn.dhs.org&hostname=<h>&hostscmd=edit&hostscmdstage=2&type=1&ip=<a> |
|
HP |
https://server-name/nic/update?group=group-name&myip=<a> |
|
ODS |
ods://update.ods.org |
|
GNUDIP |
gnudip://server-name |
|
PeanutHull |
oray://phservice2.oray.net |
No username or password is included in the URL address. To configure the username and password, use the username command and the password command.
HP and GNUDIP are common DDNS update protocols. The server-name parameter is the domain name or IP address of the service provider's server using one of the update protocols.
The URL address for an update request can start with:
· http://—The HTTP-based DDNS server.
· https://—The HTTPS-based DDNS server.
· ods://—The TCP-based ODS server.
· gnudip://—The TCP-based GNUDIP server.
· oray://—The TCP-based DDNS server.
The domain names of DDNS servers are members.3322.org and phservice2.oray.net. The domain names of PeanutHull DDNS servers can be phservice2.oray.net, phddns60.oray.net, client.oray.net, ph031.oray.net, and so on. Determine the domain name in the URL according to the actual situation.
The port number in the URL address is optional. If you do not specify a port number, the default port number is used. HTTP uses port 80, HTTPS uses port 443, and the PeanutHull server uses port 6060.
The system automatically performs the following tasks:
· Fills <h> with the FQDN that is specified when the DDNS policy is applied to the interface.
· Fills <a> with the primary IP address of the interface to which the DDNS policy is applied.
You might also manually specify an FQDN and an IP address in <h> and <a>, respectively. After that, the FQDN that is specified when the DDNS policy is applied becomes ineffective. However, manual configuration of <h> and <a> is not recommended.
You cannot specify an FQDN and IP address in the URL address for contacting the PeanutHull server. Alternatively, you can specify an FQDN when applying the DDNS policy to an interface. The system automatically uses the primary IP address of the interface to which the DDNS policy is applied as the IP address for DDNS update.
To avoid misinterpretation, do not include colons (:), at signs (@), and question marks (?) in your login ID or password, even if you can do so.
If you use the url command multiple times with different URL addresses, the most recent configuration takes effect.
Examples
# Specify the URL address for DDNS policy steven_policy with login ID steven and password nevets. The device contacts www.3322.org for DDNS update.
<Sysname> system-view
[Sysname] ddns policy steven_policy
[Sysname-ddns-policy-steven_policy] url http:// members.3322.org/dyndns/update?system=dyndns&hostname=<h>&myip=<a>
Related commands
· ddns policy
· display ddns policy
· password
· username
username
Use username to specify the username to be included in the URL address for DDNS update requests.
Use undo username to remove the username.
Syntax
username username
undo username
Default
No username is specified for the URL address.
Views
DDNS policy view
Predefined user roles
network-admin
Parameters
username: Specifies the username, a case-sensitive string of 1 to 32 characters.
Examples
# Specify the username as steven to be included in the URL address for update requests of DDNS policy steven_policy.
<Sysname> system-view
[Sysname] ddns policy steven_policy
[Sysname-ddns-policy-steven_policy] username steven
Related commands
· ddns policy
· display ddns policy
· password
· url
