Port 2391
3com-net-mgmt · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | 3com-net-mgmt |
Frequently asked questions
What is port 2391 used for?
Port 2391 is registered with the IANA for 3com-net-mgmt (TCP/UDP). Description: 3COM Net Management.
Is port 2391 a well-known port?
No. Port 2391 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 2391 is open?
Locally on Linux with ss -tulpn | grep ':2391\b', on Windows with netstat -ano | findstr :2391. To test a remote host use Test-NetConnection <host> -Port 2391 in PowerShell or nc -zv <host> 2391 on Linux/macOS.
How do I open port 2391 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 2391/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=2391/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 2391" -Direction Inbound -Protocol TCP -LocalPort 2391 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | 3com-net-mgmt | 3COM Net Management |
| UDP | 3com-net-mgmt | 3COM Net Management |