How to block IP addresses in Apache by using regular expressions (regex) in .htaccess

Apache: How to block IP addresses in Apache by using regular expressions (regex) in .htaccess

You can use regex in your .htaccess rules. You have to utilize a Rewrite Rule (so make sure you have the rewrite engine turned on) to do this block.

  1. <IfModule mod_rewrite.c>
  2.     RewriteCond %{REMOTE_ADDR} ^123.111.222.(1[0-9]|3[3-6]|9[0-9]$ [OR]
  3.     RewriteCond %{REMOTE_ADDR} ^123.222.111.1([0-2][0-9])$
  4.     RewriteRule .* - [F]
  5. <\/IfModule>

Don't forget that you will probably need to enable the rewrite engine for these rules to work. Click the button below to find out how to do this.

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