Cisco 500 Series, Руководство по настройке

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16-15
Cisco Security Appliance Command Line Configuration Guide
OL-12172-03
Chapter 16 Identifying Traffic with Access Lists
Simplifying Access Lists with Object Grouping
Step 2
(Optional) To add a description, enter the following command:
hostname(config-icmp-type)# description text
The description can be up to 200 characters.
Step 3
To define the ICMP types in the group, enter the following command for each type:
hostname(config-icmp-type)# icmp-object icmp_type
See the “ICMP Types” section on page D-15 for a list of ICMP types.
For example, to create an ICMP type group that includes echo-reply and echo (for controlling ping),
enter the following commands:
hostname(config)# object-group icmp-type ping
hostname(config-service)# description Ping Group
hostname(config-icmp-type)# icmp-object echo
hostname(config-icmp-type)# icmp-object echo-reply
Nesting Object Groups
To nest an object group within another object group of the same type, first create the group that you want
to nest according to the
“Adding Object Groups” section on page 16-12 . Then perform the following
steps:
Step 1 To add or edit an object group under which you want to nest another object group, enter the following
command:
hostname(config)# object-group {{ protocol | network | icmp-type } grp_id | service grp_id
{ tcp | udp | tcp-udp }}
Step 2
To add the specified group under the object group you specified in Step 1, enter the following command:
hostname(config- group_type )# group-object grp_id
The nested group must be of the same type.
You can mix and match nested group objects and regular objects within an object group.
For example, you create network object groups for privileged users from various departments:
hostname(config)# object-group network eng
hostname(config-network)#
network-object host 10.1.1.5
hostname(config-network)# network-object host 10.1.1.9
hostname(config-network)# network-object host 10.1.1.89
hostname(config-network)# object-group network hr
hostname(config-network)# network-object host 10.1.2.8
hostname(config-network)#
network-object host 10.1.2.12
hostname(config-network)# object-group network finance
hostname(config-network)#
network-object host 10.1.4.89
hostname(config-network)# network-object host 10.1.4.100
You then nest all three groups together as follows:
hostname(config)# object-group network admin