Bug ID 421612: CGNAT traffic through SIP-ALG will not have outbound connections and addresses logged

Last Modified: Jul 18, 2026

Affected Product(s):
BIG-IP CGN(all modules)

Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10

Fixed In:
11.6.0

Opened: May 21, 2013

Severity: 2-Critical

Related Article: K14725

Symptoms

Subscriber traffic through the Carrier Grade NAT and SIP-ALG will not have all the addresses and ports used by the subscriber logged.

Impact

Some subscriber traffic will not have translation addresses logged as expected.

Conditions

CGNAT and SIP-ALG configured and subscriber sending SIP traffic.

Workaround

None

Fix Information

None

Behavior Change

ALG now has an option enabled with a db var to log the messages and media/data connections so that they can be traced to an LSN subscriber.

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips