Cisco 7604 Configuration Guide - Page 495

Chapter 22 Applying Application Layer Protocol Inspection SIP Inspection OL-20748-01 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, as specified in the To header or Contact header, 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 calling party, as specified in the From header, enter the following command: hostname(config-cmap)# match [not] calling-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. e. (Optional) To match a content length in the SIP header, enter the following command: hostname(config-cmap)# match [not] content length gt length Where length is the number of bytes the content length is greater than. 0 to 65536. f. (Optional) To match an SDP content type or regular expression, enter the following command: hostname(config-cmap)# match [not] content type {sdp | 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. g. (Optional) To match a SIP IM subscriber, enter the following command: hostname(config-cmap)# match [not] im-subscriber 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. h. (Optional) To match a SIP via header, enter the following command: hostname(config-cmap)# match [not] message-path 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. i. (Optional) To match a SIP request method, enter the following command: hostname(config-cmap)# match [not] request-method method Where method is the type of method to match (ack, bye, cancel, info, invite, message, notify, options, prack, refer, register, subscribe, unknown, update). j. (Optional) To match the requester of a third-party registration by matching the From header in SIP REGISTER messages, enter the following command. This command only matches the requestor when the contents of the To and From fields in a SIP REGISTER message are different. hostname(config-cmap)# match [not] third-party-registration 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. Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM 22-79