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When running multiple sites on the same hosting account, one might find that an attacker has attempted to breach one site. A webmaster may want to block the IP address from all sites hosted in the same account.

Is there a way to keep the list of banned IP addresses/ranges in a single location that can be referenced by all the websites in the same account?

(Example: a file that contains a list of IP addresses/ranges located at the root of the file system and simply referenced in the .htaccess file of each website.)

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Is there a reason why you wouldn't just use your Apache configuration file to deny the IP's? – dan Oct 2 '13 at 19:23
I could, but with multiple sites I'd need to update multiple .htaccess files, right? How could I use one file containing the list of blocked IPs and then use it for all sites? – authentictech Oct 2 '13 at 19:35
See my answer below. – dan Oct 3 '13 at 15:02
up vote 1 down vote accepted

The more efficient way to blacklist IP addresses is to use your operating system's firewall, or by using a module coded specifically for this purpose, like ModSecurity.

If you don't have access to your OS and cannot add modules, then you could edit your Apache configuration file with the following (to block the example IP address

<Location />
order allow,deny
allow from all
deny from

Then restart Apache. As covered here, that should work for all your virtual hosts.

Alternatively, you can try to use the include directive for each virtual host config as covered here (use deny from for each IP to block instead of allow from).

Lastly, if you do not have access to either your OS's firewall, server modules, or server configuration files (as might be the case with a shared web hosting account), you could use a server-side script like Perl to copy the IP's from a central file into each .htaccess file, and schedule this as a cron job so that each virtual host will share the same list of IP's to blacklist/block.

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Can any include statement (or similar) be used in a .htaccess file, assuming a shared virtual host with no access to OS or Apache configuration files? – authentictech Oct 4 '13 at 13:51
Not according to the link I provided for include: Includes other configuration files from within the server configuration files. Your only option with so little control over the server is to use a server-side script (like Perl) to copy the IP's into each .htaccess file from a single file, and run that periodically as a cron job. – dan Oct 4 '13 at 14:47
OK. Your last sentence would be helpful as part of your answer. Once you include it I will mark this as the answer. Thanks. – authentictech Oct 4 '13 at 14:52
No problem, will do. – dan Oct 4 '13 at 14:53

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