If Moxa Nport is connected to a network behind a firewall, the following ports must be opened in the firewall:


Port 950 (~965) tcp data tcp, Port 966 (~981) tcp data flow control

All ports used:

Protocol Port No. Purpose
TCP 23 Telnet
TCP 80 Web Console
TCP 4900 1.Save Settings
2.Firmware upgrade
TCP 950(~965) Data port
TCP 966(~981) Command port
UDP 1029 1.Broadcast Search
2.Get Current Settings
3.Real COM Installer mapping