Port 477
ss7ns · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | ss7ns |
Frequently asked questions
What is port 477 used for?
Port 477 is registered with the IANA for ss7ns (TCP/UDP). Description: ss7ns.
Is port 477 a well-known port?
Yes. Port 477 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 477 is open?
Locally on Linux with ss -tulpn | grep ':477\b', on Windows with netstat -ano | findstr :477. To test a remote host use Test-NetConnection <host> -Port 477 in PowerShell or nc -zv <host> 477 on Linux/macOS.
How do I open port 477 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 477/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=477/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 477" -Direction Inbound -Protocol TCP -LocalPort 477 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | ss7ns | ss7ns |
| UDP | ss7ns | ss7ns |