Port 537
nmsp · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | nmsp |
Frequently asked questions
What is port 537 used for?
Port 537 is registered with the IANA for nmsp (TCP/UDP). Description: Networked Media Streaming Protocol.
Is port 537 a well-known port?
Yes. Port 537 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 537 is open?
Locally on Linux with ss -tulpn | grep ':537\b', on Windows with netstat -ano | findstr :537. To test a remote host use Test-NetConnection <host> -Port 537 in PowerShell or nc -zv <host> 537 on Linux/macOS.
How do I open port 537 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 537/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=537/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 537" -Direction Inbound -Protocol TCP -LocalPort 537 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | nmsp | Networked Media Streaming Protocol |
| UDP | nmsp | Networked Media Streaming Protocol |