Port 731
netviewdm3 · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | netviewdm3 |
Frequently asked questions
What is port 731 used for?
Port 731 is registered with the IANA for netviewdm3 (TCP/UDP). Description: IBM NetView DM/6000 receive/tcp.
Is port 731 a well-known port?
Yes. Port 731 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 731 is open?
Locally on Linux with ss -tulpn | grep ':731\b', on Windows with netstat -ano | findstr :731. To test a remote host use Test-NetConnection <host> -Port 731 in PowerShell or nc -zv <host> 731 on Linux/macOS.
How do I open port 731 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 731/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=731/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 731" -Direction Inbound -Protocol TCP -LocalPort 731 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | netviewdm3 | IBM NetView DM/6000 receive/tcp |
| UDP | netviewdm3 | IBM NetView DM/6000 receive/tcp |