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Cisco Bug: CSCsz50890 - SIP Inspection Fails to Open RTP Pinholes

Last Modified

Oct 07, 2014

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(22)T3 12.4(24)T

Description (partial)

Symptom:
Voice RTP stream fails to pass through the firewall with SIP inspection enabled.

Conditions:
SIP traffic is matched and inspection is applied.

<blockquote>
class-map type inspect match-all AllowedOut
 match access-group name Phone_ACL
 match protocol sip
!
policy-map type inspect InsideToOutside
 class type inspect AllowedOut
  inspect
 class class-default
  drop log
</blockquote>
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