Bug ID 931033: Device ID Deletions anomaly might be raised in case of browser/hardware change

Last Modified: Jan 20, 2023

Bug Tracker

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

Known Affected Versions:
15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,

Opened: Jul 26, 2020
Severity: 4-Minor


-- Valid users complain they are unable to connect, or they are required to do CAPTCHA frequently. -- On the BIG-IP device, 'Device ID Deletion' violations are being raised.


Valid requests might be mitigated.


-- Bot Defense Profile with 'Device ID' mode set to 'Generate After Access' is attached to the virtual server. -- Some change in the browser or computer hardware occurs. -- Surfing to multiple qualified pages at the same time.


Raise the threshold of 'Device ID Deletion' anomaly (recommended value according to the webserver, is approximately 4).

Fix Information


Behavior Change