Bug ID 651980: In Internet Explorer 6, encrypting ajax may cause significant slowdown for single page applications

Last Modified: Jul 12, 2023

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,

Opened: Mar 17, 2017

Severity: 4-Minor


Browsing a single page application in Microsoft Internet Explorer 6 may become very slow if full ajax encryption is enabled.


Very slow browsing experience in Internet Explorer 6. Sometimes you cannot start using the page in browser stack, or it never loaded. In other cases, the page stops responding after sending request


Single page applications that support Internet Explorer 6 and activate full ajax encryption.


Disabled ajax encryption in Internet Explorer 6 using a custom JavaScript function. Note: BIG-IP software does not support Internet Explorer 6.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips