Port 902
ideafarm-door · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | ideafarm-door |
Frequently asked questions
What is port 902 used for?
Port 902 is registered with the IANA for ideafarm-door (TCP/UDP). Description: self documenting Telnet Door; self documenting Door: send 0x00 for info.
Is port 902 a well-known port?
Yes. Port 902 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 902 is open?
Locally on Linux with ss -tulpn | grep ':902\b', on Windows with netstat -ano | findstr :902. To test a remote host use Test-NetConnection <host> -Port 902 in PowerShell or nc -zv <host> 902 on Linux/macOS.
How do I open port 902 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 902/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=902/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 902" -Direction Inbound -Protocol TCP -LocalPort 902 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | ideafarm-door | self documenting Telnet Door |
| UDP | ideafarm-door | self documenting Door: send 0x00 for info |