Bug ID 748043: MRF SIP ALG with SNAT: SIP Response message not forwarded by BIG-IP

Last Modified: May 14, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.1.0, 14.1.0.1

Fixed In:
14.1.0.2, 13.1.1.5

Opened: Oct 26, 2018
Severity: 3-Major

Symptoms

SIP Server sends SIP Request to the client. The SIP Server inserts a different port, so that response are received on a different port. The Client sends the response on the new requested port. BIG-IP drops the packet

Impact

SIP Request will not receive the SIP Response

Conditions

SIP Server wants the SIP Response to be coming on a different port.

Workaround

There is no workaround.

Fix Information

Fix BIG-IP to process the SIP Response and send it to the SIP Server

Behavior Change