Bug ID 1325321: BIG-IP performs source address translation even after disabling NAT64

Last Modified: Jun 19, 2025

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

Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6

Opened: Jul 26, 2023

Severity: 3-Major

Symptoms

The BIG-IP system continues performing source address translation after disabling NAT64 on a virtual server.

Impact

Source address translation occurs even after disabling the nat64 flag.

Conditions

-- NAT64 is enabled on a virtual server. -- SNAT option changed to "None"

Workaround

Restart tmm after disabling the nat64 flag on virtual server configuration.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips