Bug ID 707054: SYN Cookie MSS for Fast L4 Profiles is limited to 256-9162

Last Modified: Jul 12, 2023

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1

Fixed In:

Opened: Feb 16, 2018

Severity: 4-Minor


User cannot configure SYN Cookie MSS values for Fast L4 Profiles outside of 256-9162.


Under syncookie activated condition, server side MSS lower than SYN Cookie MSS lower limit cannot be honored on client side. As a result, server side MSS discards data segment if larger than SYN Cookie MSS lower limit.


Under syncookie activated condition, SYN Cookie MSS value is set to < 256.



Fix Information

This ID allows to configured 128-9162.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips