Port 112
mcidas · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | mcidas |
Frequently asked questions
What is port 112 used for?
Port 112 is registered with the IANA for mcidas (TCP/UDP). Description: McIDAS Data Transmission Protocol.
Is port 112 a well-known port?
Yes. Port 112 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 112 is open?
Locally on Linux with ss -tulpn | grep ':112\b', on Windows with netstat -ano | findstr :112. To test a remote host use Test-NetConnection <host> -Port 112 in PowerShell or nc -zv <host> 112 on Linux/macOS.
How do I open port 112 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 112/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=112/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 112" -Direction Inbound -Protocol TCP -LocalPort 112 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | mcidas | McIDAS Data Transmission Protocol |
| UDP | mcidas | McIDAS Data Transmission Protocol |