Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP AFM
Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1
Fixed In:
13.1.0
Opened: Nov 21, 2016 Severity: 3-Major
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.
RST packets that do not relate to any existing flows are dropped, while they should not be dropped if the loose-init option enabled.
AFM provisioned. -- FastL4 virtual server. -- Loose-init option enabled.
No workaround
This issue is resolved on BIG-IP 12.1.3.2 and later v12.1.x releases with the fix for bug 644822 https://cdn.f5.com/product/bugtracker/ID644822.html. In these releases, FastL4 virtual servers with the loose-init option enabled will forward RST packets.