Bug ID 446402: CGNAT Logging: interleave deterministic NAT states in LTM log

Last Modified: May 29, 2024

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0

Fixed In:
11.6.0, 11.5.1, 11.5.0 HF1, 11.4.1 HF4

Opened: Jan 27, 2014

Severity: 2-Critical

Related Article: K15437


Deterministic NAT state from multiple TMMs can be interleaved in LTM log, making dnatutil unable to use the state information for reverse mapping.


Reverse mapping using interleaved deterministic NAT state log entries in the LTM log could be incorrect.


Configuration change to LSN Pool with deterministic NAT mode while BIGIP is serving connections.


Capture and fix interleaved log entries for deterministic NAT, and use the fixed log entries for reverse mapping.

Fix Information

Deterministic NAT state information will be logged from one TMM when configuration changes.

Behavior Change

deterministic NAT configuration state information will now be logged once per change in configuration.

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips