Bug ID 717328: XLAT iRule commands do not support TCP Fast Open

Last Modified: Jan 20, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP CGN(all modules)

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 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, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4

Opened: Apr 27, 2018
Severity: 3-Major

Symptoms

TCP::collect may not find initial data payloads in TFO connections, causing unexpected behavior during iRule execution.

Impact

Loss of connectivity on TCP Fast Open connections.

Conditions

Usage of TCP::collect iRule with TCP Fast Open connections.

Workaround

Disable TCP Fast Open in TCP profiles attached to ALGTK virtual servers by configuring: 'fast-open disabled'.

Fix Information

None

Behavior Change