Port 539
apertus-ldp · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | apertus-ldp |
Frequently asked questions
What is port 539 used for?
Port 539 is registered with the IANA for apertus-ldp (TCP/UDP). Description: Apertus Technologies Load Determination.
Is port 539 a well-known port?
Yes. Port 539 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 539 is open?
Locally on Linux with ss -tulpn | grep ':539\b', on Windows with netstat -ano | findstr :539. To test a remote host use Test-NetConnection <host> -Port 539 in PowerShell or nc -zv <host> 539 on Linux/macOS.
How do I open port 539 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 539/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=539/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 539" -Direction Inbound -Protocol TCP -LocalPort 539 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | apertus-ldp | Apertus Technologies Load Determination |
| UDP | apertus-ldp | Apertus Technologies Load Determination |