Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP CGN
Known Affected Versions:
11.3.0, 11.4.0, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10
Fixed In:
11.6.0
Opened: Aug 30, 2013 Severity: 3-Major Related Article:
K14725
Session Initiation Protocol (SIP) RTP/RTCP connections do not honor Large Scale NAT (LSN) pool translation port ranges.
Its is not possible to trace which subscriber initiated a RTP/RTCP connection using LSN logs.
This affects all SIP RTP/RTCP connections in all LSN modes(NAPT and DNAT). The BIG-IP system chooses any valid ephemeral port instead of the range specified in the LSN pool.
There is no workaround for this issue.
SIP media connections now select ports using the CGNAT port selection modes. Media connections will be traceable using standard methods.