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Admin Tools

#9677 Using the IP Blacklist

Posted in ‘Admin Tools for Joomla! 4 & 5’
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Environment Information

Joomla! version
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PHP version
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Admin Tools version
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Latest post by nicholas on Tuesday, 26 October 2010 23:24 CDT

Tuesday, 26 October 2010 07:23 CDT

user8789
Hi, Prior to installing Admin pro I was using IP Deny entries inside my .htaccess. It looks like the IP Blacklist is working in the same way but it does not edit the .htaccess. How does it trap requests for resources outside Joomla/PHP? It certainly seems to work because I can see log entries for attempts on files that have nothing to do with Joomla.

Also I would like to apply the same Blacklist to multiple sites. So far I created a MySQl script SQL but it would be nice to have a built in way to share or migrate any of the blacklists.

Thanks, Robin

Tuesday, 26 October 2010 23:24 CDT

nicholas
The blacklist feature works only through Joomla!. Each and every request made to Joomla! is intercepted by the "System - Admin Tools" system plugin and the IP is checked against the specified blacklist. If a git occurs, a 403 error is raised and the page load stops cold on its tracks.

That said, when an attacker tries to access a non-Joomla! file he usually does so at random, referencing a file which doesn't exist. Thanks to Joomla!'s default .htaccess (or the optimized .htaccess produced by Admin Tools' .htaccess Maker) all such requests are automatically diverted to Joomla!. This causes the aforementioned check to take place and they get blocked.

If you see in your logs files which do exist and get blocked, it's not because of Admin Tools. Some hosts implement the mod_security or mod_evasive Apache modules which support similar blacklisting features. In this case, the request is intercepted and blocked long before any file from your site is read.

I hope that clarifies the process a bit :)

Nicholas K. Dionysopoulos

Lead Developer and Director

🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
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