I have a sytem operating via the internet that provides remote control for VHF radio transmitters. It operates using static i/p's at both termination points with the routers forwarding ports 5004, 5006 and 5008 to the private i/p of each device. To operate, each device has to be configured with the public i/p of the remote device. This works fine with the staic i/p's. I have now been asked see if the system will operate using non static addresses on the public network. I have been told that VLAN may be an option. I am new to VLAN so any advice would be appreciated.