Bug ID 947937: HTTP iRule commands may fail to execute within the "fallback-host" HTTP profile field.

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(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, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 16.0.0, 16.0.0.1

Opened: Sep 23, 2020
Severity: 4-Minor

Symptoms

The BIG-IP system can redirect a request to a fallback host when the target pool is unavailable. If the configured fallback host within the HTTP profile contains HTTP iRule commands such as HTTP::host or HTTP::uri, the corresponding HTTP request can fail. A connection reset may be encountered instead.

Impact

When utilizing the HTTP profile with "fallback-host" profile option with HTTP iRule commands, incorrect connection resets can be seen by the client instead of the correct HTTP response.

Conditions

- HTTP profile with "fallback-host" profile option configured containing an HTTP iRule command.

Workaround

Attaching an iRule containing HTTP::redirect or similar command to the virtual server can be used instead of the fallback host-profile option to redirect traffic to another virtual server.

Fix Information

None

Behavior Change