I'm attempting ISPconfig + Mongrel setup. I would like to place my proxy stuff into the "Apache Directives (Optional):" box. It doesn't matter what I put in there though I always get: You cannot assign HTTPD Includes to this website This is what I would like to put in there (substituting my own configuration) ServerName myapp.com ServerAlias www.myapp.com ProxyPass / http://www.myapp.com:8000/ ProxyPassReverse / http://www.myapp.com:8000 ProxyPreserveHost on Even if I cut this down to just: ServerAlias www.myapp.com I still get the error. How can I diagnose this problem. I have looked in the apache error log but nothing is there.