The controller fails to start and throws an error:
The controller is unable to use X.X.X.X:48000. Aborting. The address/port may already be in use.
Make sure that the port is actually open by checking netstat
Disable any antivirus and firewall\iptables you have installed
Make sure that the actual hostname and IP are listed first in the host file
For Windows - Windows\System32\Drivers\Etc
For Linux - /etc/hosts
192.168.1.77??? MainNMS(your actual server name)