Howtoforge posted a guide about installing RoundCube (over SSL) and Webmin with fail2ban for ISPConfig 3 on Debian Squeeze

I prefer the RoundCube solution over the default in ISPConfig 3. I also find it useful to have the webmin installed in all my systems. In this post you can see a very fast way to have both of them installed, in companion with the great support of fail2ban. Finally I want to access all of them over SSL (even phpmyadmin -- see the tip in the end).

  Easy RoundCube (Over SSL) And Webmin With fail2ban For ISPConfig 3 On Debian Squeeze