Port 3751

gprs-cube · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicegprs-cube
Registered2003-04

Frequently asked questions

What is port 3751 used for?

Port 3751 is registered with the IANA for gprs-cube (TCP/UDP). Description: CommLinx GPRS Cube.

Is port 3751 a well-known port?

No. Port 3751 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3751 is open?

Locally on Linux with ss -tulpn | grep ':3751\b', on Windows with netstat -ano | findstr :3751. To test a remote host use Test-NetConnection <host> -Port 3751 in PowerShell or nc -zv <host> 3751 on Linux/macOS.

How do I open port 3751 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3751/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3751/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3751" -Direction Inbound -Protocol TCP -LocalPort 3751 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPgprs-cubeCommLinx GPRS Cube
UDPgprs-cubeCommLinx GPRS Cube

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