Port 283
rescap · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | rescap |
Frequently asked questions
What is port 283 used for?
Port 283 is registered with the IANA for rescap (TCP/UDP). Description: rescap.
Is port 283 a well-known port?
Yes. Port 283 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 283 is open?
Locally on Linux with ss -tulpn | grep ':283\b', on Windows with netstat -ano | findstr :283. To test a remote host use Test-NetConnection <host> -Port 283 in PowerShell or nc -zv <host> 283 on Linux/macOS.
How do I open port 283 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 283/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=283/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 283" -Direction Inbound -Protocol TCP -LocalPort 283 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | rescap | rescap |
| UDP | rescap | rescap |