Bug ID 745514: MRF SIP ALG with SNAT does not translate media addresses in SDP after SUBSCRIBE message

Last Modified: Nov 22, 2021

Bug Tracker

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 14.0.0,,,,,, 14.0.1, 14.1.0,

Fixed In:
15.0.0,,, 13.1.3

Opened: Sep 28, 2018
Severity: 3-Major


The media addresses in the SDP payload are not translated by MRF SIP ALD with SNAT after a SUBSCRIBE message has been processed.


Media addresses in the SDP payload are not translated.


This occurs because the SUBSCRIBE message has has the TO and FROM headers with the same value causing the ALG to enter hairpin mode.


There is no workaround.

Fix Information

Hairpin mode is not entered when processing SUBSCRIBE messages

Behavior Change