Bug ID 441888: Hardware syn cookies enabling has no effect on unsupported platforms

Last Modified: May 29, 2024

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

Known Affected Versions:
11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:

Opened: Dec 31, 2013

Severity: 5-Cosmetic


Hardware syn cookies are not supported on non-HSB platforms such as 4200/2200 platforms. However, both CLI and GUI have options to enable this option. Enabling this option has no effect on unsupported platforms.


Enabling this option has no effect on unsupported platforms.


This occurs on non-HSB platforms when using hardware syn cookies.


Although there is no workaround, this is a cosmetic issue. The system internally detects whether a platform supports hardware syn cookies and ignores the setting on unsupported platforms.

Fix Information

The system now displays Hardware SYN Cookie Protection only on the platforms that support it.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips