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Home Support Product FAQs Which are the most common TCP and UDP ports used by serial-to-Ethernet device servers?

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QUESTION

Which are the most common TCP and UDP ports used by serial-to-Ethernet device servers?

I plan to locate my device server behind a NAT router and access it remotely. Which TCP and UDP ports do I need to configure in the NAT/firewall settings of my router?

SOLUTION

The following table lists the most common TCP and UDP ports needed for various functions on Moxa’s serial-to-Ethernet device servers:

DE-311/211/30x/33x Series Device Servers

Protocol Port No. Purpose
TCP 23 Telnet Communication
TCP 4000 Firmware Upgrade
TCP 950 to 965 Data Port
TCP 966 to 981 Command Port
UDP 1029 Broadcast search, Monitoring the status of the NPort, getting the current settings, and Real COM mode mapping

NPort 5000 Series; NPort 5000A, NPort IA5000A, NPort P5150A, NPort W2x50, NE-4100, and MiiNePort Series Device Servers

Protocol Port No. Purpose
TCP 23 Telnet Communication
TCP 80 Web UI
TCP 950 to 965 Data Port
TCP 966 to 981 Command Port
UDP 4800 Broadcast search, Monitoring the status of the NPort, getting the current settings, and Real COM mode mapping
TCP 4900 Firmware upgrade

NPort 6000 Series, NPort W2x50 Plus, NPort W2x50A, W2004 Series Secured Wireless Device Servers

Protocol Port No. Purpose
TCP 22 Secure Telnet (SSH)
TCP 23 Telnet
TCP 80 Web UI
TCP 443 Secure Web Console (SSL)
TCP 950 to 965 Data Port
TCP 966 to 981 Command Port
UDP 4800 Broadcast search, Monitoring the status of the NPort, getting the current settings, and Real COM mode mapping

NPort 6610-32/6650-32 Series Rackmount Terminal Servers

Protocol Port No. Purpose
TCP 982 to 997 Data Port
TCP 998 to 1013 Command Port

NPort 5200-P/NE-4100-P Series Programmable Device Servers

Protocol Port No. Purpose
UDP 4800 Broadcast search, monitoring the status of the NPort, and getting the current settings
TCP 4900 Firmware upgrade

NPort S8000 Series Combo Switch/Serial Device Servers

Protocol Port No. Purpose
TCP 23 Telnet
TCP 80 Web UI
TCP 443 Secure Web Console (SSL)
TCP 950 to 965 Data Port
TCP 966 to 981 Command Port
UDP 4800 Broadcast search, monitoring the status of the NPort, getting the current settings, and for the Real COM Installer
TCP 4900 Firmware upgrade
LAST UPDATED: Oct 09, 2025 ・ Views: 27688 ・Type: Specifications
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