I have one ISPConfig3 set up on lenny - it backs up nicely every night to a Western Digital My World Book using google's back-res script very nicely so I'm confident if the worst should happen, i do a fresh install and restore using the script. I'm looking now, at opportunities of using the 'is mirror' function in ISPConfig with a second server. Can someone give some advice as to: What functionallity does this give? Does is act as a fall back for the main server? I only have one public IP, can I still use an 'is mirror' service? Are there any guides to doing this? Thanks for any help.