Port 9966
odnsp · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | odnsp |
| Registered | 2006-05 |
Frequently asked questions
What is port 9966 used for?
Port 9966 is registered with the IANA for odnsp (TCP/UDP). Description: OKI Data Network Setting Protocol.
Is port 9966 a well-known port?
No. Port 9966 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 9966 is open?
Locally on Linux with ss -tulpn | grep ':9966\b', on Windows with netstat -ano | findstr :9966. To test a remote host use Test-NetConnection <host> -Port 9966 in PowerShell or nc -zv <host> 9966 on Linux/macOS.
How do I open port 9966 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 9966/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9966/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9966" -Direction Inbound -Protocol TCP -LocalPort 9966 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | odnsp | OKI Data Network Setting Protocol |
| UDP | odnsp | OKI Data Network Setting Protocol |