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Cisco Bug: CSCta01656 - NAT ALG incorrectly translates User Agent field in SIP message header

Last Modified

Jan 24, 2017

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(15)T6

Description (partial)

Symptom:

User Agent field in the NAT SIP header will contain IP addresses after passing a NAT interface

Conditions:

This happens when NAT ALG is used and there is a permit any any in the NAT ACL. There is no known performance impact.
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