I successfully installed ISPCOnfig3 following The Perfect Server - Debian Squeeze (Debian 6.0) With BIND & Courier [ISPConfig 3] then RoundCube following Easy RoundCube (Over SSL) And Webmin With fail2ban For ISPConfig 3 On Debian Squeeze Everything went well. Now I have: ISPConfig: https://servername.domain1.com:8888 Web1: http://www.domain1.com Web2: http://www.domain2.com Web3: http://www.domain3.com Adding "/webmail" to each URI, I get redirected to: https://www.domainX:8888/webmail/ ...and Roudcube works as expected. My question is: you can assign a port to roundcube different from that of ISPConfig? Or: can I make ispconfig respond only on https://servername.domain1.com:8888 and not on https://www.domainX:8888/ ? Thanks for any help.