Table of Contents

Chapter 1 ACL Configuration. 1-1

1.1 ACL Overview. 1-1

1.1.1 ACL Matching Order 1-2

1.1.2 Ways to Apply an ACL on a Switch. 1-3

1.1.3 Types of ACLs Supported by S3100 Series Ethernet Switches. 1-3

1.2 ACL Configuration. 1-4

1.2.1 Configuring Time Range. 1-4

1.2.2 Configuring Basic ACL. 1-5

1.2.3 Configuring Advanced ACL. 1-7

1.2.4 Configuring Layer 2 ACL. 1-8

1.2.5 Configuring an IPv6 ACL. 1-10

1.3 ACL Assignment 1-12

1.3.1 Assigning an ACL Globally. 1-13

1.3.2 Assigning an ACL to a VLAN. 1-13

1.3.3 Assigning an ACL to a Port Group. 1-14

1.3.4 Assigning an ACL to a Port 1-15

1.4 Displaying ACL Configuration. 1-16

1.5 Example for Upper-Layer Software Referencing ACLs. 1-16

1.5.1 Example for Controlling Telnet Login Users by Source IP. 1-16

1.5.2 Example for Controlling Web Login Users by Source IP. 1-17

1.6 Example for Applying ACLs to Hardware. 1-18

1.6.1 Basic ACL Configuration Example. 1-18

1.6.2 Advanced ACL Configuration Example. 1-19

1.6.3 Layer 2 ACL Configuration Example. 1-19

1.6.4 IPv6 ACL Configuration Example. 1-20

1.6.5 Example for Applying an ACL to a Port Group. 1-21

 

Chapter 1  ACL Configuration

1.1  ACL Overview

As the network scale and network traffic are increasingly growing, security control and bandwidth assignment play a more and more important role in network management. Filtering data packets can prevent a network from being accessed by unauthorized users efficiently while controlling network traffic and saving network resources. Access control lists (ACL) are often used to filter packets with configured matching rules.

Upon receiving a packet, the switch compares the packet with the rules of the ACL applied on the current port to permit or discard the packet.

The rules of an ACL can be referenced by other functions that need traffic classification, such as QoS.

ACLs classify packets using a series of conditions known as rules. The conditions can be based on source addresses, destination addresses and port numbers carried in the packets.

According to their application purposes, ACLs fall into the following four types.

l           Basic ACL. Rules are created based on source IP addresses only.

l           Advanced ACL. Rules are created based on the Layer 3 and Layer 4 information such as the source and destination IP addresses, type of the protocols carried by IP, protocol-specific features, and so on.

l           Layer 2 ACL. Rules are created based on the Layer 2 information such as source and destination MAC addresses, VLAN priorities, type of Layer 2 protocol, and so on.

l           User-defined ACL. An ACL of this type matches packets by comparing the strings retrieved from the packets with specified strings. It defines the byte it begins to perform “and” operation with the mask on the basis of packet headers.

 

 

1.1.1  ACL Matching Order

An ACL can contain multiple rules, each of which matches specific type of packets. So the order in which the rules of an ACL are matched needs to be determined.

The rules in an ACL can be matched in one of the following two ways:

l           config: where rules in an ACL are matched in the order defined by the user.

l           auto: where rules in an ACL are matched in the order determined by the system, namely the “depth-first” rule.

For depth-first rule, there are two cases:

I. Depth-first match order for rules of a basic ACL

1)         Range of source IP address: The smaller the source IP address range (that is, the more the number of zeros in the wildcard mask), the higher the match priority.

2)         Fragment keyword: A rule with the fragment keyword is prior to others.

3)         If the above two conditions are identical, the earlier configured rule applies.

II. Depth-first match order for rules of an advanced ACL

1)         Protocol range: A rule which has specified the types of the protocols carried by IP is prior to others.

2)         Range of source IP address: The smaller the source IP address range (that is, the more the number of zeros in the wildcard mask), the higher the match priority.

3)         Range of destination IP address. The smaller the destination IP address range (that is, the more the number of zeros in the wildcard mask), the higher the match priority.

4)         Range of Layer 4 port number, that is, TCP/UDP port number. The smaller the range, the higher the match priority.

5)         Number of parameters: the more the parameters, the higher the match priority.

If rule A and rule B are still the same after comparison in the above order, the weighting principles will be used in deciding their priority order. Each parameter is given a fixed weighting value. This weighting value and the value of the parameter itself will jointly decide the final matching order. Involved parameters with weighting values from high to low are icmp-type, established, dscp, tos, precedence, fragment. Comparison rules are listed below.

l           The smaller the weighting value left, which is a fixed weighting value minus the weighting value of every parameter of the rule, the higher the match priority.

l           If the types of parameter are the same for multiple rules, then the sum of parameters’ weighting values of a rule determines its priority. The smaller the sum, the higher the match priority.

 

 

1.1.2  Ways to Apply an ACL on a Switch

I. Being applied to the hardware directly

In the switch, an ACL can be directly applied to hardware for packet filtering and traffic classification. In this case, the rules in an ACL are matched in the order determined by the hardware instead of that defined in the ACL. For H3C S3100 series Ethernet switches, the earlier the rule applies, the higher the match priority.

ACLs are directly applied to hardware when they are used for:

l           Implementing QoS

l           Filtering the packets to be forwarded

II. Being referenced by upper-level software

ACLs can also be used to filter and classify the packets to be processed by software. In this case, the rules in an ACL can be matched in one of the following two ways:

l           config, where rules in an ACL are matched in the order defined by the user.

l           auto, where the rules in an ACL are matched in the order determined by the system, namely the “depth-first” order.

When applying an ACL in this way, you can specify the order in which the rules in the ACL are matched. The match order cannot be modified once it is determined, unless you delete all the rules in the ACL and define the match order.

An ACL can be referenced by upper-layer software:

l           Referenced by routing policies

l           Used to control Telnet, SNMP and Web login users

 

 

1.1.3  Types of ACLs Supported by S3100 Series Ethernet Switches

S3100 Series Ethernet switches support the following types of ACLs.

l           Basic ACLs

l           Advanced ACLs

l           Layer 2 ACLs

l           IPv6 ACLs

Note that ACLs defined on S3100 Series Ethernet switches can be applied to hardware directly or referenced by upper-layer software for packet filtering.

1.2  ACL Configuration

1.2.1  Configuring Time Range

Time ranges can be used to filter packets. You can specify a time range for each rule in an ACL. A time range-based ACL takes effect only in specified time ranges. Only after a time range is configured and the system time is within the time range, can an ACL rule take effect.

Two types of time ranges are available:

l           Periodic time range, which recurs periodically on the day or days of the week.

l           Absolute time range, which takes effect only in a period of time and does not recur.

 

 

I. Configuration procedure

Table 1-1 Configure a time range

Operation	Command	Description
Enter system view	system-view	—
Create a time range	time-range time-name { start-time to end-time days-of-the-week [ from start-time start-date ] [ to end-time end-date ] | from start-time start-date [ to end-time end-date ] | to end-time end-date }	Required

 

Note that:

l           If only a periodic time section is defined in a time range, the time range is active only when the system time is within the defined periodic time section. If multiple periodic time sections are defined in a time range, the time range is active only when the system time is within one of the periodic time sections.

l           If only an absolute time section is defined in a time range, the time range is active only when the system time is within the defined absolute time section. If multiple absolute time sections are defined in a time range, the time range is active only when the system time is within one of the absolute time sections.

l           If both a periodic time section and an absolute time section are defined in a time range, the time range is active only when the periodic time range and the absolute time range are both matched. Assume that a time range contains an absolute time section ranging from 00:00 January 1, 2004 to 23:59 December 31, 2004, and a periodic time section ranging from 12:00 to 14:00 on every Wednesday. This time range is active only when the system time is within the range from 12:00 to 14:00 on every Wednesday in 2004.

l           If the start time is not specified, the time section starts from 1970/1/1 00:00 and ends on the specified end date. If the end date is not specified, the time section starts from the specified start date to 2100/12/31 23:59.

II. Configuration example

# Define a periodic time range that spans from 8:00 to 18:00 on Monday through Friday.

<Sysname> system-view

[Sysname] time-range test 8:00 to 18:00 working-day

[Sysname] display time-range test

Current time is 13:27:32 Apr/16/2005 Saturday

 

Time-range : test ( Inactive )

 08:00 to 18:00 working-day

# Define an absolute time range spans from 15:00 1/28/2006 to 15:00 1/28/2008.

<Sysname> system-view

[Sysname] time-range test from 15:00 1/28/2006 to 15:00 1/28/2008

[Sysname] display time-range test

Current time is 13:30:32 Apr/16/2005 Saturday

 

Time-range : test ( Inactive )

 From 15:00 Jan/28/2000 to 15:00 Jan/28/2004

1.2.2  Configuring Basic ACL

A basic ACL filters packets based on their source IP addresses.

A basic ACL can be numbered from 2000 to 2999.

I. Configuration prerequisites

l           To configure a time range-based basic ACL rule, you need to create the corresponding time range first. For information about time range configuration, refer to section 1.2.1  Configuring Time Range.

l           The source IP addresses based on which the ACL filters packets are determined.

II. Configuration procedure

Table 1-2 Define a basic ACL rule

Operation	Command	Description
Enter system view	system-view	—
Create an ACL and enter basic ACL view	acl number acl-number [ match-order { auto | config } ]	Required config by default
Define an ACL rule	rule [ rule-id ] { deny | permit } [ rule-string ]	Required For information about rule-string, refer to ACL Command.
Configure a description string to the ACL	description text	Optional Not configured by default

 

Note that:

l           With the config match order specified for the basic ACL, you can modify any existent rule. The unmodified part of the rule remains. With the auto match order specified for the basic ACL, you cannot modify any existent rule; otherwise the system prompts error information.

l           If you do not specify the rule-id argument when creating an ACL rule, the rule will be numbered automatically. If the ACL has no rules, the rule is numbered 0; otherwise, the number of the rule will be the greatest rule number plus one. If the current greatest rule number is 65534, however, the system will display an error message and you need to specify a number for the rule.

l           The content of a modified or created rule cannot be identical with the content of any existing rule; otherwise the rule modification or creation will fail, and the system prompts that the rule already exists.

l           With the auto match order specified, the newly created rules will be inserted in the existent ones by depth-first principle, but the numbers of the existent rules are unaltered.

III. Configuration example

# Configure ACL 2000 to deny packets whose source IP addresses are 192.168.0.1.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule deny source 192.168.0.1 0

# Display the configuration information of ACL 2000.

[Sysname-acl-basic-2000] display acl 2000

Basic ACL  2000, 1 rule

Acl's step is 1

 rule 0 deny source 192.168.0.1 0

1.2.3  Configuring Advanced ACL

An advanced ACL can filter packets by their source and destination IP addresses, the protocols carried by IP, and protocol-specific features such as TCP/UDP source and destination ports, ICMP message type and message code.

An advanced ACL can be numbered from 3000 to 3999. Note that ACL 3998 and ACL 3999 cannot be configured because they are reserved for cluster management.

Advanced ACLs support analysis and processing of three packet priority levels: type of service (ToS) priority, IP priority and differentiated services codepoint (DSCP) priority.

Using advanced ACLs, you can define classification rules that are more accurate, more abundant, and more flexible than those defined for basic ACLs.

I. Configuration prerequisites

l           To configure a time range-based advanced ACL rule, you need to create the corresponding time ranges first. For information about of time range configuration, refer to section 1.2.1  Configuring Time Range.

l           The settings to be specified in the rule, such as source and destination IP addresses, the protocols carried by IP, and protocol-specific features, are determined.

II. Configuration procedure

Table 1-3 Define an advanced ACL rule

Operation	Command	Description
Enter system view	system-view	—
Create an advanced ACL and enter advanced ACL view	acl number acl-number [ match-order { auto | config } ]	Required config by default
Define an ACL rule	rule [ rule-id ] { permit | deny } protocol [ rule-string ]	Required For information about protocol and rule-string, refer to ACL Commands.
Assign a description string to the ACL rule	rule rule-id comment text	Optional No description by default
Assign a description string to the ACL	description text	Optional No description by default

 

Note that:

l           With the config match order specified for the advanced ACL, you can modify any existent rule. The unmodified part of the rule remains. With the auto match order specified for the ACL, you cannot modify any existent rule; otherwise the system prompts error information.

l           If you do not specify the rule-id argument when creating an ACL rule, the rule will be numbered automatically. If the ACL has no rules, the rule is numbered 0; otherwise, the number of the rule will be the greatest rule number plus one. If the current greatest rule number is 65534, however, the system will display an error message and you need to specify a number for the rule.

l           The content of a modified or created rule cannot be identical with the content of any existing rules; otherwise the rule modification or creation will fail, and the system prompts that the rule already exists.

l           If the ACL is created with the auto keyword specified, the newly created rules will be inserted in the existent ones by depth-first principle, but the numbers of the existent rules are unaltered.

III. Configuration example

# Configure ACL 3000 to permit the TCP packets sourced from the network 129.9.0.0/16 and destined for the network 202.38.160.0/24 and with the destination port number being 80.

<Sysname> system-view

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule permit tcp source 129.9.0.0 0.0.255.255 destination 202.38.160.0 0.0.0.255 destination-port eq 80

# Display the configuration information of ACL 3000.

[Sysname-acl-adv-3000] display acl 3000

Advanced ACL  3000, 1 rule

Acl's step is 1

 rule 0 permit tcp source 129.9.0.0 0.0.255.255 destination 202.38.160.0 0.0.0.255 destination-port eq www

1.2.4  Configuring Layer 2 ACL

Layer 2 ACLs filter packets according to their Layer 2 information, such as the source and destination MAC addresses, VLAN priority, and Layer 2 protocol types.

A Layer 2 ACL can be numbered from 4000 to 4999.

I. Configuration prerequisites

l           To configure a time range-based Layer 2 ACL rule, you need to create the corresponding time ranges first. For information about time range configuration, refer to section 1.2.1  Configuring Time Range

l           The settings to be specified in the rule, such as source and destination MAC addresses, VLAN priorities, and Layer 2 protocol types, are determined.

II. Configuration procedure

Table 1-4 Define a Layer 2 ACL rule

Operation	Command	Description
Enter system view	system-view	—
Create a Layer 2 ACL and enter Layer 2 ACL view	acl number acl-number	Required
Define an ACL rule	rule [ rule-id ] { permit | deny } rule-string	Required For information about rule-string, refer to ACL Commands.
Assign a description string to the ACL rule	rule rule-id comment text	Optional No description by default
Assign a description string to the ACL	description text	Optional No description by default

 

Note that:

l           You can modify any existent rule of the Layer 2 ACL and the unmodified part of the ACL remains.

l           If you do not specify the rule-id argument when creating an ACL rule, the rule will be numbered automatically. If the ACL has no rules, the rule is numbered 0; otherwise, the number of the rule will be the greatest rule number plus one. If the current greatest rule number is 65534, however, the system will display an error message and you need to specify a number for the rule.

l           The content of a modified or created rule cannot be identical with the content of any existing rules; otherwise the rule modification or creation will fail, and the system prompts that the rule already exists.

III. Configuration example

# Configure ACL 4000 to deny packets sourced from the MAC address 000d-88f5-97ed, destined for the MAC address 0011-4301-991e, and with their 802.1p priority being 3.

<Sysname> system-view

[Sysname] acl number 4000

[Sysname-acl-ethernetframe-4000] rule deny cos 3 source 000d-88f5-97ed ffff-ffff-ffff dest 0011-4301-991e ffff-ffff-ffff

# Display the configuration information of ACL 4000.

[Sysname-acl-ethernetframe-4000] display acl 4000

Ethernet frame ACL  4000, 1 rule

Acl's step is 1

 rule 0 deny cos excellent-effort source 000d-88f5-97ed ffff-ffff-ffff dest 0011-4301-991e ffff-ffff-ffff

1.2.5  Configuring an IPv6 ACL

You can match IPv6 packets by IPv6 ACLs to process IPv6 data flows as required. S3100 Series Ethernet switches support matching the following fields:

l           dscp: Matches the traffic class field in IPv6 packets.

l           ip-protocol: Matches the next header field in IPv6 packets.

l           src-ip: Matches the source address field in IPv6 packets.

l           dest-ip: Matches the destination address field in IPv6 packets.

l           src-port: Matches the TCP/UDP source port field in IPv6 packets.

l           dest-port: Matches the TCP/UDP destination port field in IPv6 packets.

l           icmpv6-type: Matches the ICMPv6 type field in IPv6 packets.

l           icmpv6-code: Matches the ICMPv6 code field in IPv6 packets.

 

 

Before applying an IPv6 ACL, be sure to configure an IPv6 ACL template to specify the fields to be matched. Also make sure that the contents of the IPv6 ACL are a subset of the contents of the template. Otherwise, you cannot apply the IPv6 ACL to the hardware.

I. Configuration prerequisites

l           To configure time range-based IPv6 ACL rules, you need to create the corresponding time ranges first. For information about time range configuration, refer to section 1.2.1  Configuring Time Range.

l           The settings to be specified in the rule are determined.

II. Configuration procedure

Table 1-5 Define an IPv6 ACL rule

Operation	Command	Description
Enter system view	system-view	—
Configure an IPv6 ACL template	ipv6-acl-template  { dscp | ip-protocol | src-ip | dest-ip | src-port | dest-port | icmpv6-type | icmpv6-code } *	Required By default, no IPv6 ACL template is configured. To specify the src-port, dest-port, icmpv6-type or icmpv6-code keyword in the command, you need to specify the ip-protocol keyword at first.
Create an IPv6 ACL and enter IPv6 ACL view	acl number acl-number	Required
Define an ACL rule	rule [ rule-id ] { permit | deny } [ dscp rule-string  rule-mask ] [ ip-protocol rule-string  rule-mask ] [ src-ip ipv6-address prefix-length ] [ dest-ip ipv6-address prefix-length ] [ [ src-port rule-string  rule-mask | dest-port rule-string  rule-mask ] * | [ icmpv6-type rule-string  rule-mask | icmpv6-code rule-string  rule-mask ] * ] [ time-range time-name ]	Required To specify the src-port or dest-port keyword in the command, you need to specify the ip-protocol rule-string rule-mask combination as TCP or UDP, that is, 0x06 or 0x11. To specify the icmpv6-type or icmpv6-code keyword, you need to specify the ip-protocol rule-string rule-mask combination as ICMPv6, that is, 0x3a.
Assign a description string to the ACL rule	rule rule-id comment text	Optional No description by default
Assign a description string to the ACL	description text	Optional No description by default

 

Note that:

l           You can modify any existent rule of an IPv6 ACL. If you modify only the action to be taken or the time range, the unmodified part of the rule remains the same. If you modify the contents of a user-defined string, the new string overwrites the original one.

l           If you do not specify the rule-id argument when creating an ACL rule, the rule will be numbered automatically. If the ACL has no rules, the rule is numbered 0; otherwise, the number of the rule will be the greatest rule number plus one. If the current greatest rule number is 65534, however, the system will display an error message and you need to specify a number for the rule.

l           The content of a modified or created rule cannot be identical with the content of any existing rule of the ACL; otherwise the rule modification or creation will fail, and the system prompts that the rule already exists.

 

 

III. Configuration example

# Configure an rule for IPv6 ACL 5000, denying packets from 3001::1/64 to 3002::1/64.

<Sysname> system-view

[Sysname] acl number 5000

[Sysname-acl-user-5000] rule deny src-ip 3001::1 64 dest-ip 3002::1 64

# Display the configuration information of ACL 5000.

[Sysname-acl-user-5000] display acl 5000

User defined ACL  5000, 1 rule

Acl's step is 1

 rule 0 deny src-ip 3001::1 64 dest-ip 3002::1 64

1.3  ACL Assignment

On an S3100 Ethernet switch, you can assign ACLs to the hardware for packet filtering.

As for ACL assignment, the following four ways are available.

l           Assigning ACLs globally, for filtering the inbound packets on all the ports.

l           Assigning ACLs to a VLAN, for filtering the inbound packets on all the ports and belonging to a VLAN.

l           Assigning ACLs to a port group, for filtering the inbound packets on all the ports in a port group. For information about port group, refer to Port Basic Configuration.

l           Assigning ACLs to a port, for filtering the inbound packets on a port.

You can assign ACLs in the above-mentioned ways as required.

 

 

1.3.1  Assigning an ACL Globally

I. Configuration prerequisites

Before applying ACL rules to a VLAN, you need to define the related ACLs. For information about defining an ACL, refer to section 1.2.2  Configuring Basic ACL, section 1.2.3  Configuring Advanced ACL, section 1.2.4  Configuring Layer 2 ACL, and section 1.2.5  Configuring an IPv6 ACL.

II. Configure procedure

Table 1-6 Assign an ACL globally

Operation	Command	Description
Enter system view	system-view	—
Assign an ACL globally	packet-filter inbound acl-rule	Required For description on the acl-rule argument, refer to ACL Command.

 

III. Configuration example

# Apply ACL 2000 globally to filter the inbound packets on all the ports.

<Sysname> system-view

[Sysname] packet-filter inbound ip-group 2000

1.3.2  Assigning an ACL to a VLAN

I. Configuration prerequisites

Before applying ACL rules to a VLAN, you need to define the related ACLs. For information about defining an ACL, refer to section 1.2.2  Configuring Basic ACL, section 1.2.3  Configuring Advanced ACL, section 1.2.4  Configuring Layer 2 ACL, and section 1.2.5  Configuring an IPv6 ACL.

II. Configuration procedure

Table 1-7 Assign an ACL to a VLAN

Operation	Command	Description
Enter system view	system-view	—
Apply an ACL to a VLAN	packet-filter vlan vlan-id  inbound acl-rule	Required For description on the acl-rule argument, refer to ACL Command.

 

 

III. Configuration example

# Apply ACL 2000 to VLAN 10 to filter the inbound packets of VLAN 10 on all the ports.

<Sysname> system-view

[Sysname] packet-filter vlan 10 inbound ip-group 2000

1.3.3  Assigning an ACL to a Port Group

I. Configuration prerequisites

Before applying ACL rules to a VLAN, you need to define the related ACLs. For information about defining an ACL, refer to section 1.2.2  Configuring Basic ACL, section 1.2.3  Configuring Advanced ACL, section 1.2.4  Configuring Layer 2 ACL, and section 1.2.5  Configuring an IPv6 ACL.

II. Configuration procedure

Table 1-8 Assign an ACL to a port group

Operation	Command	Description
Enter system view	system-view	—
Enter port group view	port-group group-id	—
Apply an ACL to the port group	packet-filter inbound acl-rule	Required For description on the acl-rule argument, refer to ACL Command.

 

 

III. Configuration example

# Apply ACL 2000 to port group 1 to filter the inbound packets on all the ports in the port group.

<Sysname> system-view

[Sysname] port-group 1

[Sysname-port-group-1] packet-filter inbound ip-group 2000

1.3.4  Assigning an ACL to a Port

I. Configuration prerequisites

Before applying ACL rules to a VLAN, you need to define the related ACLs. For information about defining an ACL, refer to section 1.2.2  Configuring Basic ACL, section 1.2.3  Configuring Advanced ACL, section 1.2.4  Configuring Layer 2 ACL, and section 1.2.5  Configuring an IPv6 ACL.

II. Configuration procedure

Table 1-9 Apply an ACL to a port

Operation	Command	Description
Enter system view	system-view	—
Enter Ethernet port view	interface interface-type interface-number	—
Apply an ACL to the port	packet-filter inbound acl-rule	Required For description on the acl-rule argument, refer to ACL Command.

 

 

III. Configuration example

# Apply ACL 2000 to Ethernet 1/0/1 to filter the inbound packets.

<Sysname> system-view

[Sysname] interface Ethernet 1/0/1

[Sysname-Ethernet1/0/1] packet-filter inbound ip-group 2000

1.4  Displaying ACL Configuration

After the above configuration, you can execute the display commands in any view to view the ACL running information and verify the configuration.

Table 1-10 Display ACL configuration

Operation	Command	Description
Display a configured ACL or all the ACLs	display acl { all | acl-number }	In any view.
Display a time range or all the time ranges	display time-range { all | time-name }
Display the information about packet filtering	display packet-filter { global | interface interface-type interface-number | port-group [ group-id ] | unitid unit-id | vlan [ vlan-id ] }
Display the information about remaining ACL resources	display acl remaining entry
Display the IPv6 ACL template configuration information	display ipv6-acl-template

 

1.5  Example for Upper-Layer Software Referencing ACLs

1.5.1  Example for Controlling Telnet Login Users by Source IP

I. Network requirements

Apply an ACL to permit users with the source IP address of 10.110.100.52 to telnet to the switch.

II. Network diagram

Figure 1-1 Network diagram for controlling Telnet login users by source IP

III. Configuration procedure

# Define ACL 2000.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule 1 permit source 10.110.100.52 0

[Sysname-acl-basic-2000] quit

# Reference ACL 2000 on VTY user interface to control Telnet login users.

[Sysname] user-interface vty 0 4

[Sysname-ui-vty0-4] acl 2000 inbound

1.5.2  Example for Controlling Web Login Users by Source IP

I. Network requirements

Apply an ACL to permit Web users with the source IP address of 10.110.100.46 to log in to the switch through HTTP.

II. Network diagram

Figure 1-2 Network diagram for controlling Web login users by source IP

III. Configuration procedure

#  Define ACL 2001.

<Sysname> system-view

[Sysname] acl number 2001

[Sysname-acl-basic-2001] rule 1 permit source 10.110.100.46 0

[Sysname-acl-basic-2001] quit

# Reference ACL 2001 to control users logging in to the Web server.

[Sysname] ip http acl 2001

1.6  Example for Applying ACLs to Hardware

1.6.1  Basic ACL Configuration Example

I. Network requirements

PC 1 and PC 2 connect to the switch through Ethernet 1/0/1. PC1’s IP address is 10.1.1.1. Apply an ACL on Ethernet 1/0/1 to deny packets with the source IP address of 10.1.1.1 from 8:00 to 18:00 everyday.

II. Network diagram

Figure 1-3 Network diagram for basic ACL configuration

III. Configuration procedure

# Define a periodic time range that is active from 8:00 to 18:00 everyday.

<Sysname> system-view

[Sysname] time-range test 8:00 to 18:00 daily

# Define ACL 2000 to filter packets with the source IP address of 10.1.1.1.

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule 1 deny source 10.1.1.1 0 time-range test

[Sysname-acl-basic-2000] quit

# Apply ACL 2000 on Ethernet 1/0/1.

[Sysname] interface Ethernet1/0/1

[Sysname-Ethernet1/0/1] packet-filter inbound ip-group 2000

1.6.2  Advanced ACL Configuration Example

I. Network requirements

Different departments of an enterprise are interconnected through a switch. The IP address of the wage query server is 192.168.1.2. The R&D department is connected to Ethernet 1/0/1 of the switch. Apply an ACL to deny requests from the R&D department and destined for the wage server during the working hours (8:00 to 18:00).

II. Network diagram

Figure 1-4 Network diagram for advanced ACL configuration

III. Configuration procedure

# Define a periodic time range that is active from 8:00 to 18:00 everyday.

<Sysname> system-view

[Sysname] time-range test 8:00 to 18:00 working-day

# Define ACL 3000 to filter packets destined for wage query server.

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule 1 deny ip destination 192.168.1.2 0 time-range test

[Sysname-acl-adv-3000] quit

# Apply ACL 3000 on Ethernet 1/0/1.

[Sysname] interface Ethernet1/0/1

[Sysname-Ethernet1/0/1] packet-filter inbound ip-group 3000

1.6.3  Layer 2 ACL Configuration Example

I. Network requirements

PC 1 and PC 2 connect to the switch through Ethernet 1/0/1. PC1’s MAC address is 0011-0011-0011. Apply an ACL to filter packets with the source MAC address of 0011-0011-0011 and the destination MAC address of 0011-0011-0012 from 8:00 to 18:00 everyday.

II. Network diagram

Figure 1-5 Network diagram for Layer 2 ACL

III. Configuration procedure

# Define a periodic time range that is active from 8:00 to 18:00 everyday.

<Sysname> system-view

[Sysname] time-range test 8:00 to 18:00 daily

# Define ACL 4000 to filter packets with the source MAC address of 0011-0011-0011 and the destination MAC address of 0011-0011-0012.

[Sysname] acl number 4000

[Sysname-acl-ethernetframe-4000] rule 1 deny source 0011-0011-0011 ffff-ffff-ffff dest 0011-0011-0012 ffff-ffff-ffff time-range test

[Sysname-acl-ethernetframe-4000] quit

# Apply ACL 4000 on Ethernet 1/0/1.

[Sysname] interface Ethernet1/0/1

[Sysname-Ethernet1/0/1] packet-filter inbound link-group 4000

1.6.4  IPv6 ACL Configuration Example

I. Network requirements

PC 1 and PC 2 connect to the switch through Ethernet 1/0/1. The IP address of PC 1 is 3001::1/64. Configure an ACL to filter packets that PC 1 sends to 3002::1/64 from 8:00 to 18:00 everyday.

II. Network diagram

Figure 1-6 Network diagram for IPv6 ACL configuration

III. Configuration procedure

# Define a periodic time range that is active from 8:00 to 18:00 everyday.

<Sysname> system-view

[Sysname] time-range test 8:00 to 18:00 daily

# Define an IPv6 ACL template to match the source address and destination address fields in IPv6 packets.

[Sysname] ipv6-acl-template src-ip dest-ip

# Create an IPv6 ACL and configure a rule for the ACL, denying packets from 3001::1/64 to 3002::1/64.

[Sysname] acl number 5000

[Sysname-acl-user-5000] rule deny src-ip 3001::1 64 dest-ip 3002::1 64

[Sysname-acl-user-5000] quit

# Apply the ACL to port Ethernet 1/0/1.

[Sysname] interface Ethernet1/0/1

[Sysname-Ethernet1/0/1] packet-filter inbound user-group 5000

1.6.5  Example for Applying an ACL to a Port Group

I. Network requirements

PC 1, PC 2 and PC 3 connect to the switch through Ethernet 1/0/1, Ethernet 1/0/2 and Ethernet 1/0/3 respectively. Ethernet 1/0/1, Ethernet 1/0/2 and Ethernet 1/0/3 are port members of port group 1. The IP address of the database server is 192.168.1.2. Apply an ACL to deny packets from PCs in port group 1 to the database server from 8:00 to 18:00 in working days.

II. Network diagram

Figure 1-7 Network diagram for applying an ACL to a port group

III. Configuration procedure

# Define a periodic time range that is active from 8:00 to 18:00 in working days.

<Sysname> system-view

[Sysname] time-range test 8:00 to 18:00 working-day

# Define an ACL to deny packets destined for the database server.

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule 1 deny ip destination 192.168.1.2 0 time-range test

[Sysname-acl-adv-3000] quit

# Create port group 1 and add Ethernet 1/0/1, Ethernet 1/0/2, and Ethernet 1/0/3 in the port group 1.

[Sysname] port-group 1

[Sysname-port-group-1] port Ethernet 1/0/1 to Ethernet 1/0/3

# Apply ACL 3000 to port group 1.

[Sysname-port-group-1] packet-filter inbound ip-group 3000