Bug ID 726734: DAGv2 port lookup stringent may fail

Last Modified: May 29, 2024

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

Known Affected Versions:,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,, 14.0.0,,,,,, 14.0.1,

Fixed In:

Opened: Jul 04, 2018

Severity: 3-Major


Under certain circumstances tmm might not be able to find a local port, and the connection may fail. This happens, for example, for active FTP with mirroring enabled.


Connection cannot get established.


Active FTP with mirroring enabled.


There is no workaround other than to disable mirroring.

Fix Information

TMM is now always able to find a local port.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips