Bug ID 644822: FastL4 virtual server with enabled loose-init option works differently with/without AFM provisioned

Last Modified: May 14, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP AFM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8

Fixed In:
14.0.0, 13.1.1, 12.1.3.2

Opened: Feb 14, 2017
Severity: 2-Critical
Related AskF5 Article:
K19245372

Symptoms

If AFM provisioned, a FastL4 virtual server with enabled loose-init option drops all RST packets that do not relate to any existing flows. This behavior does not match the BIG-IP behavior when AFM is not provisioned.

Impact

RST packets that do not relate to any existing flows are dropped, while they should not be dropped if the loose-init option enabled.

Conditions

AFM provisioned. -- FastL4 virtual server. -- Loose-init option enabled.

Workaround

No workaround.

Fix Information

Fixed, so FastL4 virtual servers with enabled loose-init option will forward any RST packets.

Behavior Change