Cisco Systems 2960-S, 2960 Creating Named MAC Extended ACLs

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Catalyst 2960 and 2960-S Switch Software Configuration Guide

OL-8603-09

Chapter 31 Configuring Network Security with ACLs

Creating Named MAC Extended ACLs

Switch(config-ext-nacl)# exit

Switch(config)# interface gigabitethernet0/2

Switch(config-if)# ip access-group strict in

In this example of a numbered ACL, the workstation that belongs to Jones is allowed access, and the

workstation that belongs to Smith is not allowed access:

Switch(config)# access-list 1 remark Permit only Jones workstation through

Switch(config)# access-list 1 permit 171.69.2.88

Switch(config)# access-list 1 remark Do not allow Smith workstation through

Switch(config)# access-list 1 deny 171.69.3.13

In this example of a numbered ACL, the Winter and Smith workstations are not allowed to browse the

web:

Switch(config)# access-list 100 remark Do not allow Winter to browse the web

Switch(config)# access-list 100 deny host 171.69.3.85 any eq www

Switch(config)# access-list 100 remark Do not allow Smith to browse the web

Switch(config)# access-list 100 deny host 171.69.3.13 any eq www

In this example of a named ACL, the Jones subnet is not allowed access:

Switch(config)# ip access-list standard prevention

Switch(config-std-nacl)# remark Do not allow Jones subnet through

Switch(config-std-nacl)# deny 171.69.0.0 0.0.255.255

In this example of a named ACL, the Jones subnet is not allowed to use outbound Telnet:

Switch(config)# ip access-list extended telnetting

Switch(config-ext-nacl)# remark Do not allow Jones subnet to telnet out

Switch(config-ext-nacl)# deny tcp 171.69.0.0 0.0.255.255 any eq telnet

Creating Named MAC Extended ACLs

You can filter non-IPv4 traffic on a VLAN or on a Layer 2 interface by using MAC addresses and named

MAC extended ACLs. The procedure is similar to that of configuring other extended nam ed ACLs.

Note MAC ACLs are supported only when the switch is running the LAN base image.

For more information about the supported non-IP protocols in the mac access-list extended command,

see the command reference for this release.

Note Though visible in the command-line help strings, appletalk is not supported as a matching co ndition for

the deny and permit MAC access-list configuration mode commands.

Beginning in privileged EXEC mode, follow these steps to create a named MAC extended ACL:

Command Purpose

Step 1 configure terminal Enter global configuration mode.

Step 2 mac access-list extended name Define an extended MAC access list using a name.