You can use apache rewrite rules when virtual hosting Zope instances and as far as I know, it works just the same as having a direct conection to the Zope Instance... Unlike proxying, the zope instance should reply directly to the client so it must have access to their ip address.... There is some documentation about, but this is an extract of what we use... The Zope instance has a Virtual Host Monster in its root to enable all this to work properly. Apache rewrite rule: <VirtualHost localzopehost> ServerName server.nipltd.com ServerAdmin adminemail@yourdomain.com RewriteEngine On RewriteRule ^/error/(.*)$ /error/$1 [L]) RewriteRule ^(.*)$ http://localhost:8080/VirtualHostBase/http/server.nipltd.com:80/VirtualHostR oot$1 [P] ProxyPassReverse / http://localhost:8080/VirtualHostBase/http/server.niptld.com:80/VirtualHostR oot/ ErrorDocument 502 /yourerrordocument CustomLog /yourlogs/access_log combined ErrorLog /yourlogs/error_log </VirtualHost> I think you should just be able to fill that in and off you go... Good luck! ChrisK