Bug ID 1125773: TCP options are disabled while hardware SYN cookie is active

Last Modified: Mar 30, 2024

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

Known Affected Versions:
14.1.4,,,,,,, 14.1.5,,,,,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,

Fixed In:
17.1.0, 15.1.9

Opened: Jul 12, 2022

Severity: 3-Major


TCP options are not included in the SYN/ACK packet generated by hardware while hardware SYN cookie mode is active.


Minor performance impact on the connections of the related virtual server.


- VELOS or rSeries platform - Hardware SYN cookie is activated on a virtual server



Fix Information

The TCP options are enabled in SYN/ACK packets generated by hardware.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips