Bug ID 721570: TMM core when trying to log an unknown subscriber

Last Modified: May 29, 2024

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1

Fixed In:
14.1.0, 14.0.0,

Opened: May 23, 2018

Severity: 1-Blocking

Related Article: K20285019


Using CGNAT or FW-NAT with subscriber-id logging enabled can cause a TMM core when the subscriber ID is unknown.


Traffic disrupted while tmm restarts.


-- A LSN pool or FW-NAT source translation that has a logging profile with subscriber-id enabled. -- A PEM profile that allows unknown subscribers.


Config PEM to deny connections from unknown subscribers.

Fix Information

The system no longer crashes. It logs 'unknown' for unknown subscribers.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips