Port 9951
apc-9951 · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | apc-9951 |
Frequently asked questions
What is port 9951 used for?
Port 9951 is registered with the IANA for apc-9951 (TCP/UDP). Description: APC 9951.
Is port 9951 a well-known port?
No. Port 9951 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 9951 is open?
Locally on Linux with ss -tulpn | grep ':9951\b', on Windows with netstat -ano | findstr :9951. To test a remote host use Test-NetConnection <host> -Port 9951 in PowerShell or nc -zv <host> 9951 on Linux/macOS.
How do I open port 9951 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 9951/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9951/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9951" -Direction Inbound -Protocol TCP -LocalPort 9951 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | apc-9951 | APC 9951 |
| UDP | apc-9951 | APC 9951 |