Cisco FirePOWER ASA 5500 series Configuration Manual page 457

Chapter 25 Configuring Application Layer Protocol Inspection
To create an H.323 inspection policy map, perform the following steps:
Step 1 (Optional) Add one or more regular expressions for use in traffic matching commands according to the
"Creating a Regular Expression" section on page
commands described in
(Optional) Create one or more regular expression class maps to group regular expressions according to
Step 2
the "Creating a Regular Expression Class Map" section on page
(Optional) Create an H.323 inspection class map by performing the following steps.
Step 3
A class map groups multiple traffic matches. Traffic must match all of the match commands to match
the class map. You can alternatively identify match commands directly in the policy map. The
difference between creating a class map and defining the traffic match directly in the inspection policy
map is that the class map lets you create more complex match criteria, and you can reuse class maps.
To specify traffic that should not match the class map, use the match not command. For example, if the
match not command specifies the string "example.com," then any traffic that includes "example.com"
does not match the class map.
For the traffic that you identify in this class map, you can specify actions such as drop-connection, reset,
and/or log the connection in the inspection policy map.
If you want to perform different actions for each match command, you should identify the traffic
directly in the policy map.
Create the class map by entering the following command:
a.
hostname(config)# class-map type inspect h323 [match-all] class_map_name
hostname(config-cmap)#
Where the class_map_name is the name of the class map.The match-all keyword specifies that
traffic must match all criteria to match the class map. match-all is the default and only option. The
CLI enters class-map configuration mode, where you can enter one or more match commands.
b. (Optional) To add a description to the class map, enter the following command:
hostname(config-cmap)# description string
Where string is the description of the class map (up to 200 characters).
(Optional) To match a called party, enter the following command:
c.
hostname(config-cmap)# match [not] called-party regex {class class_name | regex_name}
Where the regex regex_name argument is the regular expression you created in
regex_class_name is the regular expression class map you created in
(Optional) To match a media type, enter the following command:
d.
hostname(config-cmap)# match [not] media-type {audio | data | video}
Create an H.323 inspection policy map, enter the following command:
Step 4
hostname(config)# policy-map type inspect h323 policy_map_name
hostname(config-pmap)#
Where the policy_map_name is the name of the policy map. The CLI enters policy-map configuration
mode.
(Optional) To add a description to the policy map, enter the following command:
Step 5
hostname(config-pmap)# description string
OL-10088-01
21-6. See the types of text you can match in the match
Step 3.
Cisco Security Appliance Command Line Configuration Guide
H.323 Inspection
21-8.s
Step 1. The class
Step 2.
25-39