Port 555
dsf · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | dsf |
Frequently asked questions
What is port 555 used for?
Port 555 is registered with the IANA for dsf (TCP/UDP). Description: .
Is port 555 a well-known port?
Yes. Port 555 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 555 is open?
Locally on Linux with ss -tulpn | grep ':555\b', on Windows with netstat -ano | findstr :555. To test a remote host use Test-NetConnection <host> -Port 555 in PowerShell or nc -zv <host> 555 on Linux/macOS.
How do I open port 555 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 555/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=555/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 555" -Direction Inbound -Protocol TCP -LocalPort 555 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | dsf | |
| UDP | dsf |