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

Last Modified: May 29, 2024

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

Known Affected Versions:
14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2

Fixed In:
17.1.0, 15.1.9

Opened: Jul 12, 2022

Severity: 3-Major

Symptoms

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

Impact

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

Conditions

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

Workaround

None

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