Bug ID 606875: DoS Application - Block requests from suspicious browsers feature causes javascript latency for webapp first page

Last Modified: Sep 13, 2023

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

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1

Fixed In:
13.0.0, 12.1.2

Opened: Jul 25, 2016

Severity: 3-Major


When an end-user accesses a web-site's first page there is a noticeable latency until it gets the page content.


Bad user experience when accessing the website's first page.


This occurs when ASM is provisioned with proactive bot defense enabled, when accessing the page for a first time.



Fix Information

The javascript has improved as much as possible to reduce the time to get the website's first page.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips