Bug ID 757486: Errors in IE11 console appearing with Bot Defense profile

Last Modified: Apr 24, 2024

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

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,, 15.0.0, 15.0.1,,,,, 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: Feb 03, 2019

Severity: 4-Minor


When Bot Defense profile is used and has Browser Verification enabled to either Verify Before Access, or Verify After Access, Microsoft Internet Explorer v11 (IE11) Browsers may display the following errors in the browser console: HTML1512: Unmatched end tag. a.html (26,1) HTML1514: Extra "<body>" tag found. Only one "<body>" tag should exist per document. a.html (28,1)


Cosmetic error messages appear in an end user's browser console.


-- Bot Defense profile is enabled with Browser Verification. -- End user clients are using the IE11 browser.


In order to work around this issue, inject the scripts to the '<body>' tag instead of the '<head>' tag. This can be done using this tmsh command: tmsh mod sys db dosl7.parse_html_inject_tags value after,body,before,/body`

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips