Port 39
rlp · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | rlp |
Frequently asked questions
What is port 39 used for?
Port 39 is registered with the IANA for rlp (TCP/UDP). Description: Resource Location Protocol.
Is port 39 a well-known port?
Yes. Port 39 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 39 is open?
Locally on Linux with ss -tulpn | grep ':39\b', on Windows with netstat -ano | findstr :39. To test a remote host use Test-NetConnection <host> -Port 39 in PowerShell or nc -zv <host> 39 on Linux/macOS.
How do I open port 39 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 39/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=39/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 39" -Direction Inbound -Protocol TCP -LocalPort 39 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | rlp | Resource Location Protocol |
| UDP | rlp | Resource Location Protocol |