[squishi]

Originally Posted by Boofo

Here is what I use and it works fine for me.

RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(.+\.)?yoursite\.com/ [NC]
RewriteRule .*attachment\.php*$ http://www.yoursite.com/forums/images/nohotlinking.jpg [L,R,NC]

Cool. That worked for me! Thank you very much, Boofo!

Some questions/comments about your solution:
You match "(.+\.)?". Any referer that will end with ".yoursite.com/" can still hotlink your images. So it's probably better to use "(www\.)?", unless you also want to allow subdomains.

Just a theoretical question: Is the dollar sign in the match pattern really needed? Because once the "*" is reached, it will match all the following characters. But I guess you need to tell the pattern where to start the search...

I don't know why my solution did not work. Maybe it was the pattern, maybe it was the NC,R,L...