Port 2122

caupc-remote · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicecaupc-remote

Frequently asked questions

What is port 2122 used for?

Port 2122 is registered with the IANA for caupc-remote (TCP/UDP). Description: CauPC Remote Control.

Is port 2122 a well-known port?

No. Port 2122 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 2122 is open?

Locally on Linux with ss -tulpn | grep ':2122\b', on Windows with netstat -ano | findstr :2122. To test a remote host use Test-NetConnection <host> -Port 2122 in PowerShell or nc -zv <host> 2122 on Linux/macOS.

How do I open port 2122 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 2122/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=2122/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 2122" -Direction Inbound -Protocol TCP -LocalPort 2122 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPcaupc-remoteCauPC Remote Control
UDPcaupc-remoteCauPC Remote Control

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