What do you do when you have a client that is not communicating with your master server? First, you should check the firewall rules and open port configurations to verify that everything looks right. You should then check the host file where you are likely to see line after line of names. If you’re anything like me, you probably find this very frustrating. Everyone wants to use a short name, bypass protocol, or short cuts via host files, but do they realize this can create confusion and issues?