Bug ID 528808: Source NAT translation doesn't work when APM is disabled using iRule

Last Modified: Aug 19, 2026

Affected Product(s):
BIG-IP APM(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, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4

Fixed In:
12.1.0, 11.6.1, 11.5.4

Opened: Jun 19, 2015

Severity: 3-Major

Symptoms

Source NAT translation does not happen and server-side connection fails.

Impact

Proxy's server-side connection fails.

Conditions

ACCESS::disable iRule is added to the virtual server.

Workaround

Do not use the ACCESS::disable iRule command.

Fix Information

Restore the source address translation correctly even if an iRule has disabled APM.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips