Port 103
gppitnp · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | gppitnp |
Frequently asked questions
What is port 103 used for?
Port 103 is registered with the IANA for gppitnp (TCP/UDP). Description: Genesis Point-to-Point Trans Net.
Is port 103 a well-known port?
Yes. Port 103 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 103 is open?
Locally on Linux with ss -tulpn | grep ':103\b', on Windows with netstat -ano | findstr :103. To test a remote host use Test-NetConnection <host> -Port 103 in PowerShell or nc -zv <host> 103 on Linux/macOS.
How do I open port 103 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 103/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=103/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 103" -Direction Inbound -Protocol TCP -LocalPort 103 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | gppitnp | Genesis Point-to-Point Trans Net |
| UDP | gppitnp | Genesis Point-to-Point Trans Net |