I'm trying to connect from a windows 2008 server to a serial port modem that is attached to a PortServer TS4 device. The server and device are separated by a firewall. The serial port has been configured for realport and I have tcp port 771 open through the firewall. The realport drivers are installed on the server and configured with the PortServers ip address, but I have no connectivity. Are there additional ports needed to be able to see/communicate with the modem device? The normal manuals don't appear to really cover usage through a firewall.
Update. So it looks like the windows server talks to the PortServer on tcp port 771, but then the portserver tries to communicate back to the windows server on a number of ports starting from around tcp port 54700 upwards. Anyway know the full range that needs to be allowed?