Bug ID 1296493: Some valid ACKs fail SYN cookie validation in HW mode

Last Modified: May 29, 2024

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

Known Affected Versions:
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

Opened: May 08, 2023

Severity: 3-Major

Symptoms

Valid TCP connections are dropped while the virtual server is in HW SYN cookie mode.

Impact

The dropped connection needs to be retried causing initial setup latency.

Conditions

The issue is not yet fully understood.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips