Port 3121
pcmk-remote · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | pcmk-remote |
| Modified | 2013-03-15 |
Frequently asked questions
What is port 3121 used for?
Port 3121 is registered with the IANA for pcmk-remote (TCP/UDP). Description: The pacemaker remote (pcmk-remote) service extends high availability functionality outside of the Linux cluster into remote nodes.; Reserved.
Is port 3121 a well-known port?
No. Port 3121 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 3121 is open?
Locally on Linux with ss -tulpn | grep ':3121\b', on Windows with netstat -ano | findstr :3121. To test a remote host use Test-NetConnection <host> -Port 3121 in PowerShell or nc -zv <host> 3121 on Linux/macOS.
How do I open port 3121 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 3121/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3121/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3121" -Direction Inbound -Protocol TCP -LocalPort 3121 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | pcmk-remote | The pacemaker remote (pcmk-remote) service extends high availability functionality outside of the Linux cluster into remote nodes. |
| UDP | – | Reserved |