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

Last Modified: Apr 24, 2024

Affected Product(s):
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,,, 15.1.9,, 15.1.10,,,, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,,,, 16.1.4,,,

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

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips