Hello all, If this is not the right place for this question I appreciate if someone points me to some resources or mailing lists where I can ask. I have a couple of rewrite rules that simply refuse to work. Without too much noise, I'll post them here: RewriteCond %{HTTP_HOST} !^apps.example.com RewriteCond %{HTTP_HOST} ^(.*).example.com RewriteRule ^(.*)$ ${res:%1}/$1 [QSA] The logic here is: 1. make sure the URL does not start with apps 2. isolate the first part of the URL and send it to an external app: The external app either returns "members/<subdomain>" or nothing. The alternative return values in the app are: print "\n"; OR print "members/{$subdomain}\n"; 3. That's it. The idea is that if I provide a subdomain such as: - abc.example.com, I want it to pass through unchanged - def.example.com should be rewritten to def.example.com/members/def Am I doing something wrong here? Debugging rewrite rules seems to be something next to impossible so I'm left without many alternatives than to ask someone more knowledgeable than me. -- Best Regards, Ashraf Amayreh CEO | O-Minds Cell. 962 78 8099997 Tel. 962 6 5655150 Fax. 962 6 5675150 o-minds.com web development | web design user experience | branding design