Cisco 500 Series, Configuration Manual

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Cisco Security Appliance Command Line Configuration Guide
OL-12172-03
Chapter 16 Identifying Traffic with Access Lists
Simplifying Access Lists with Object Grouping
For example, to create a protocol group for TCP, UDP, and ICMP, enter the following commands:
hostname(config)# object-group protocol tcp_udp_icmp
hostname(config-protocol)#
protocol-object tcp
hostname(config-protocol)# protocol-object udp
hostname(config-protocol)# protocol-object icmp
Adding a Network Object Group
To add or change a network object group, perform the following steps. After you add the group, you can
add more objects as required by following this procedure again for the same group name and specifying
additional objects. You do not need to reenter existing objects; the commands you already set remain in
place unless you remove them with the
no form of the command.
Note
A network object group supports IPv4 and IPv6 addresses, depending on the type of access list. For more
information about IPv6 access lists, see
“Configuring IPv6 Access Lists” section on page 12-6 .
To add a network group, perform the following steps:
Step 1
To add a network group, enter the following command:
hostname(config)# object-group network
grp_id
The grp_id is a text string up to 64 characters in length.
The prompt changes to network configuration mode.
Step 2 (Optional) To add a description, enter the following command:
hostname(config-network)# description text
The description can be up to 200 characters.
Step 3 To define the networks in the group, enter the following command for each network or address:
hostname(config-network)# network-object { host ip_address | ip_address mask }
For example, to create network group that includes the IP addresses of three administrators, enter the
following commands:
hostname(config)# object-group network admins
hostname(config-network)# description Administrator Addresses
hostname(config-network)# network-object host 10.1.1.4
hostname(config-network)# network-object host 10.1.1.78
hostname(config-network)# network-object host 10.1.1.34
Adding a Service Object Group
To add or change a service object group, perform the following steps. After you add the group, you can
add more objects as required by following this procedure again for the same group name and specifying
additional objects. You do not need to reenter existing objects; the commands you already set remain in
place unless you remove them with the
no form of the command.