Port 9122

grcmp · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicegrcmp
Registered2012-11-28
Modified2025-06-12

Frequently asked questions

What is port 9122 used for?

Port 9122 is registered with the IANA for grcmp (TCP/UDP). Description: Global Relay compliant mobile instant messaging protocol; Reserved.

Is port 9122 a well-known port?

No. Port 9122 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 9122 is open?

Locally on Linux with ss -tulpn | grep ':9122\b', on Windows with netstat -ano | findstr :9122. To test a remote host use Test-NetConnection <host> -Port 9122 in PowerShell or nc -zv <host> 9122 on Linux/macOS.

How do I open port 9122 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 9122/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9122/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9122" -Direction Inbound -Protocol TCP -LocalPort 9122 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPgrcmpGlobal Relay compliant mobile instant messaging protocol
UDP–Reserved

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