I've looked at the tutorials here: https://www.howtoforge.com/tutorial/ispconfig-multiserver-setup-debian-ubuntu/ http://www.howtoforge.com/multiserv...se-servers-on-debian-squeeze-with-ispconfig-3 and in the manual for Multiserver setup. I already have ISPConfig installed and operational on several servers. What I want to do is make one of my servers a Manager of Managers. Have a top level server that can admin and manage the others. I have added the servers in the way the tutorials recommend. I.E updating the /etc/hosts file on the top level server and the remote to include each other but neither can see the other. Some questions arise: 1. Can the ISPConfig servers 'see' each other if they are on different TLD's? 2. Can the ISPConfig servers 'see' each other if they are on different IP networks? I suspect that's where my problem is. Thanks in advance.