Last Modified: Sep 13, 2023
Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3, 220.127.116.11, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1
Opened: Feb 14, 2017 Severity: 2-Critical Related Article:
Related Article: K19245372
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.
This issue is resolved on BIG-IP v13.1.0 and later with the fix for bug 629674 https://cdn.f5.com/product/bugtracker/ID629674.html. In these releases, FastL4 virtual servers with the loose-init option enabled will forward RST packets.