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Cisco ASA 5500 Series Configuration Guide using ASDM
OL-20339-01
Chapter 38 Configuring Inspection for Voice and Video Protocols
SIP Inspection
Hide server’s and endpoint’s IP addresses: Disabled.
Mask software version and non-SIP URIs: Enabled.
Ensure that the number of hops to destination is greater than 0: Enabled.
RTP conformance: Enforced.
Limit payload to audio or video, based on the signaling exchange: Yes
SIP conformance: Drop packets that fail state checking and packets that fail header validation.
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Default Level—Sets the security level back to the default.
• Details—Shows additional filtering, IP address privacy, hop count, RTP conformance, SIP
conformance, field masking, and inspections settings to configure.
Modes
The following table shows the modes in which this feature is available:
Add/Edit SIP Policy Map (Details)
The Add/Edit SIP Policy Map pane lets you configure the security level and additional settings for SIP
application inspection maps.
Fields
• Name—When adding a SIP, enter the name of the SIP map. When editing a SIP map, the name of
the previously configured SIP map is shown.
• Description—Enter the description of the SIP map, up to 200 characters in length.
• Security Level—Shows the security level settings to configure
• Filtering—Tab that lets you configure the filtering settings for SIP.
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Enable SIP instant messaging (IM) extensions—Enables Instant Messaging extensions. Default
is enabled.
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Permit non-SIP traffic on SIP port—Permits non-SIP traffic on SIP port. Permitted by default.
• IP Address Privacy—Tab that lets you configure the IP address privacy settings for SIP.
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Hide server’s and endpoint’s IP addresses—Enables IP address privacy. Disabled by default.
• Hop Count—Tab that lets you configure the hop count settings for SIP.
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Ensure that number of hops to destination is greater than 0—Enables check for the value of
Max-Forwards header is zero.
Action—Drop packet, Drop Connection, Reset, Log.
Log—Enable or Disable.
• RTP Conformance—Tab that lets you configure the RTP conformance settings for SIP.
Firewall Mode Security Context
Routed Transparent Single
Multiple
Context System
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