Hi, I've got the following situation: RHEL5.3 with Apache 2.2.3 Two servers (A + B), with A acting as a reverse proxy for B via Apache's mod_proxy. Internet --> A (mod_proxy) --> B The entire /content/ URL space is mapped and this is working just fine. For a specific request to A that results in a 404 from B I need to: Submit another request (i.e. not a client side redirect) to A via another virtual host configuration of a rewritten URL. This sub-request may result in having output filters applied to transform content from one type to another. What's the best way of doing this? The problem appears to be that the physical documents reside on B but I want the transformation / processing performed on A. I've tried the sub-request mechanism of mod_rewrite (via !-U condition) but the sub-request always returns status 200 instead of 404 (even though the first document doesn't exist on B). Does anyone know if this is an existing bug with mod_rewrite or is this expected behaviour? I realise this could probably be done best by an ErrorDocument handler but I'm not sure how to do the request to localhost:81 via a perl cgi script in such a way as to not cause issues. Any help or pointers in the right direction would be appreciated. Thanks, Best Regards, Brett My current solution (failing) looks something like this: <VirtualHost _default_:80> ... <Proxy *> Order allow,deny Allow from all </Proxy> RewriteEngine on RewriteOptions inherit #Contrived example - anything with extension .notfound does not exist on B (results in 404) RewriteCond %{REQUEST_URI} ^(.+)\.notfound$ # According to docs !-U should fail but it returns status 200 instead RewriteCond %{REQUEST_URI} !-U RewriteRule ^(.+)\.notfound?$ http://localhost:81/$1.found [L,P] # Proxy requests to B ProxyRequests Off ProxyErrorOverride on ProxyPass /content/ http://B/content/ ProxyPassReverse /content/ http://B/content/ </VirtualHost> ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx