Cisco PIX 500 Series Configuration Manual page 489

Chapter 25 Configuring Application Layer Protocol Inspection
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b. Specify the action you want to perform on the matching traffic by entering the following command:
hostname(config-pmap-c)# {[drop [send-protocol-error] |
drop-connection [send-protocol-error]| mask | reset] [log] | rate-limit message_rate }
Not all options are available for each match or class command. See the CLI help or the Cisco
Security Appliance Command Reference for the exact options available.
The drop keyword drops all packets that match.
The send-protocol-error keyword sends a protocol error message.
The drop-connection keyword drops the packet and closes the connection.
The mask keyword masks out the matching portion of the packet.
The reset keyword drops the packet, closes the connection, and sends a TCP reset to the server
and/or client.
The log keyword, which you can use alone or with one of the other keywords, sends a system log
message.
The rate-limit message_rate argument limits the rate of messages.
You can specify multiple class or match commands in the policy map. For information about the order
of class and match commands, see the
page 21-11.
Step 6 To configure parameters that affect the inspection engine, perform the following steps:
a. To enter parameters configuration mode, enter the following command:
hostname(config-pmap)# parameters
hostname(config-pmap-p)#
To configure a local domain name, enter the following command:
b.
hostname(config-pmap-p)# mail-relay domain-name action [drop-connection | log]]
Where the drop-connection action closes the connection. The log action sends a system log
message when this policy map matches traffic.
c. To enforce banner obfuscation, enter the following command:
hostname(config-pmap-p)# mask-banner
The following example shows how to define an ESMTP inspection policy map.
hostname(config)# regex user1 "user1@cisco.com"
hostname(config)# regex user2 "user2@cisco.com"
hostname(config)# regex user3 "user3@cisco.com"
hostname(config)# class-map type regex senders_black_list
hostname(config-cmap)# description "Regular expressions to filter out undesired senders"
hostname(config-cmap)# match regex user1
hostname(config-cmap)# match regex user2
hostname(config-cmap)# match regex user3
OL-12172-03
Specify the ESMTP class map that you created in
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
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.
Step 3
"Defining Actions in an Inspection Policy Map" section on
Cisco Security Appliance Command Line Configuration Guide
ESMTP Inspection
by entering the following command:
Step 3.
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