Port 633
servstat · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | servstat |
Frequently asked questions
What is port 633 used for?
Port 633 is registered with the IANA for servstat (TCP/UDP). Description: Service Status update (Sterling Software).
Is port 633 a well-known port?
Yes. Port 633 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 633 is open?
Locally on Linux with ss -tulpn | grep ':633\b', on Windows with netstat -ano | findstr :633. To test a remote host use Test-NetConnection <host> -Port 633 in PowerShell or nc -zv <host> 633 on Linux/macOS.
How do I open port 633 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 633/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=633/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 633" -Direction Inbound -Protocol TCP -LocalPort 633 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | servstat | Service Status update (Sterling Software) |
| UDP | servstat | Service Status update (Sterling Software) |