Bug ID 746746: syn-cookies incorrectly enabled in f5.ip_forwarding iApp template

Last Modified: Nov 22, 2021

Bug Tracker

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

Fixed In:

Opened: Oct 12, 2018
Severity: 3-Major


The f5.ip_fowarding iApp template disables loose-init and loose-close but does not disable syn-cookie protection in the fastL4 profile, causing traffic degradation.


Dropped packets.


Any deployment of the f5.ip_forwarding template will trigger this issue.


Disable app-service strict-updates and then disable syn-cookie-enable on the appropriate fastL4 profile.

Fix Information

SYN cookie protection is now correctly disabled in the fastL4 profile created during deployments of the f5.ip_forwarding iApp template.

Behavior Change