When i wanna save changes that I've made in global configuration, 403 error page comes up. This error also comes up in some other places. Recently I've installed "JCH plugin" "rs firewall" . I have "admin tools" too.



Access to this resource on the server is denied!

1 Answer 1


Apparently RS Firewall filters back-end requests. If this feature can't be disabled, the first thing I'd try is to disable or remove RS Firewall to see if this solves the issue.

Assuming you have the Pro version of Admin Tools, then you may have two web application firewalls enabled on your website. This is a bit like installing two virus protection programs on your computer and is a recipe for disaster (both programs trying to scrutinise the same incoming requests at the same time). I'd be inclined to keep one of Admin Tools Pro or RS Firewall (but not both).

Some other things to try:

  • update to the latest version of Joomla (if you haven't already)
  • update third party extensions to the latest versions (if you haven't already)
  • clear the Joomla cache
  • clear your web browser cache
  • temporarily switch to an alternative admin template to see if this helps
  • temporarily switch to an alternative PHP version to see if this helps (e.g. if you are on PHP 7, switch back to 5.6)
  • temporarily disable any third party administrator modules (choose Administrator from the drop down filter at Extensions -> Modules)
  • temporarily disable any third party plugins to see if this helps
  • rename your .htaccess file to .htaccess.old and copy the default htaccess.txt to .htaccess to test if the issue may be caused by something in your .htaccess file
  • try temporarily disabling mod_security if it is loaded (see https://joomla.stackexchange.com/a/9638/120 and https://joomla.stackexchange.com/a/4969/120 for examples of how to do this)
  • back up your website and try running a manual install of the latest joomla install file for your version of Joomla e.g. Joomla_3.6.2-Stable-Full_Package.zip as per the manual install procedure at https://docs.joomla.org/Updating_Joomla_%28Manual_Method%29 or similar
  • which one is better? rs firewall pro or admin tools pro?
    – kiasaty
    Aug 21, 2016 at 4:05
  • i uninstalled "rs firewall" and "admin tools" but the problem still remains! i deleted .htaccess but still..
    – kiasaty
    Aug 21, 2016 at 4:25
  • They no doubt both have their strengths and weaknesses and it probably depends on what you need and want so you are probably the only one who can answer this question. Aug 21, 2016 at 4:31
  • I added some other ideas to try Aug 21, 2016 at 4:35

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