The F flag returns a Forbidden (403 status code) response for the requested URL. This allows you to conditionally block access to certain URLs. When using the \[F\] flag, the target of the rule is not particularly important, but can be used for logging purposes. |
RewriteEngine On RewriteCond %{REMOTE_HOST} "riaa.com" RewriteRule \.mp3$ - [F] |
This particular ruleset would forbid access to .mp3 files if the remote host was in a certain domain.
Or, perhaps, you could use this flag in conjunction with the \[E\] flag (see [Flags/E]) to block requests from the Nimda worm, as well as exclude the associated entries from the log files: |
RewriteEngind On RewriteRule (cmd|root)\.exe - [F,E=dontlog:1] CustomLog /var/log/apache/access_log combined env=!dontlog |
The more verbose form of \[forbidden\] is also permitted. |
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