Bug ID 725879: Internet Explorer running on Windows phone 8.1 gets CAPTCHA during legitimate browsing

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP ASM(all modules)

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5

Fixed In:

Opened: Jun 27, 2018

Severity: 3-Major


Internet Explorer (IE) running on Microsoft Windows phone v8.1 gets CAPTCHA during legitimate browsing.


CAPTCHA occurs during legitimate browsing.


-- Proactive Bot Defense is enabled on a DoS profile attached to a virtual server. -- A client connects using IE on Windows phone v8.1.



Fix Information

A CAPTCHA event is no longer inadvertently enabled for Internet Explorer browsers on Windows Phone 8.1.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips