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Cisco Bug: CSCun85465 - 'ASA modifies Request Host Part under 'ACK' packet for SIP connection'

Last Modified

May 04, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

8.6(1.2) 9.1(2) 9.1(4)

Description (partial)

++Y.Y.Y.Y registers to X.X.X.X correctly
++Then when, Source: X.X.X.X:5060 -->Tried to Connect to Y.Y.Y.Y:5060, where Source gets Natted to X.X.X.X1 across the ASA.
++Connection packets look good with INVITE,TRYING,RINGING, 200OK;  but with ACK ASA changes the Request URI Host under the SIP packet to X.X.X.X1, which Ideally should be Y.Y.Y.Y.

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