Port 501
stmf · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | stmf |
Frequently asked questions
What is port 501 used for?
Port 501 is registered with the IANA for stmf (TCP/UDP). Description: STMF.
Is port 501 a well-known port?
Yes. Port 501 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 501 is open?
Locally on Linux with ss -tulpn | grep ':501\b', on Windows with netstat -ano | findstr :501. To test a remote host use Test-NetConnection <host> -Port 501 in PowerShell or nc -zv <host> 501 on Linux/macOS.
How do I open port 501 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 501/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=501/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 501" -Direction Inbound -Protocol TCP -LocalPort 501 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | stmf | STMF |
| UDP | stmf | STMF |