Cisco 5505 - ASA Firewall Edition Bundle, Cli Configuration Manual

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Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Inspection for Voice and Video Protocols
H.323 Inspection
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.
a.
Create the class map by entering the following command:
hostname(config)# class-map type inspect h323 [ match-all | match-any ] class_map_name
hostname(config-cmap)#
Where the class_map_name is the name of the class map. The match-all keyword is the default, and
specifies that traffic must match all criteria to match the class map. The match-any keyword
specifies that the traffic matches the class map if it matches at least one of the criteria. 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).
c.
(Optional) To match a called party, enter the following command:
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 Step 1 . The class
regex_class_name is the regular expression class map you created in Step 2 .
d.
(Optional) To match a media type, enter the following command:
hostname(config-cmap)# match [not] media-type { audio | data | video }
Step 4
Create an H.323 inspection policy map, enter the following command:
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.
Step 5
(Optional) To add a description to the policy map, enter the following command:
hostname(config-pmap)# description string
Step 6
To apply actions to matching traffic, perform the following steps.
a.
Specify the traffic on which you want to perform actions using one of the following methods:
•
Specify the H.323 class map that you created in Step 3 by entering the following command:
hostname(config-pmap)#
class
class_map_name
hostname(config-pmap-c)#
•
Specify traffic directly in the policy map using one of the match commands described in Step 3 .
If you use a match not command, then any traffic that does not match the criterion in the match
not command has the action applied.