Apache

Block request | RewriteRule | RewriteCond

• RewriteRule Flags: https://httpd.apache.org/docs/2.4/rewrite/flags.html
• RewriteCond etc.: https://httpd.apache.org/docs/2.4/rewrite/remapping.html

Rewrite commands ignore location blocks although you may put these commands inside locations blocks (not ignored if in a VirtualHost).
Be sure to filter the URI path so it applies to the same path as the location block.

<Location /a-path-of-sorts>
RewriteCond %{REQUEST_URI} ^/a-path-of-sorts/.*asdf.*$
# "-" -> do not rewrite request (pass back as is)
# "F" -> Forbidden
# "L" -> stop processing more rules
RewriteRule ^.*$ - [F,L]
</Location>

Hints:

• Always use beginning and end markers in RequestCond regex.
• Multiple RewriteCond are allowed. They have to directly preceed a RewriteRule to apply to it.