Hello, I am using a single server system for all servers (db, mail, etc.). I have a block of public IPs, so there is no port forwarding behind a LAN. I added another available IP to ISPConfig 3. Steps: System >> Server IP addresses >> Add new IP....Success Checked ISPConfig db for new IP.....success Restarted Apache....success IP recognized Added new site...won't launch. Did a reverse lookup and IP is recognized. DNS records...double, triple checked - all accurate. Put EXACT same file system and database on original IP....site launched in under 5 minutes.