Port 541
uucp-rlogin · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | uucp-rlogin |
Frequently asked questions
What is port 541 used for?
Port 541 is registered with the IANA for uucp-rlogin (TCP/UDP). Description: uucp-rlogin.
Is port 541 a well-known port?
Yes. Port 541 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 541 is open?
Locally on Linux with ss -tulpn | grep ':541\b', on Windows with netstat -ano | findstr :541. To test a remote host use Test-NetConnection <host> -Port 541 in PowerShell or nc -zv <host> 541 on Linux/macOS.
How do I open port 541 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 541/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=541/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 541" -Direction Inbound -Protocol TCP -LocalPort 541 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | uucp-rlogin | uucp-rlogin |
| UDP | uucp-rlogin | uucp-rlogin |