Firewall Issues

The LM-X license server by default communicates on TCP port 6200. This port must be opened on any firewalls separating the client and the license server. You can also open UDP port 6200 in order for the server to automatically broadcast its presence on the network. Here are some links with information about how to open ports in firewalls for different platforms:

Windows

Linux

(the instructions are for different ports, you should of course open TCP and possibly UDP ports 6200, both inbound and outbound)