- Keep game servers and their plugins updated.
- Rate-limit queries to limit DDoS amplification.
- Run game servers under an unprivileged account.
Port 9666: Zoom Control Panel Game Server Management
Port 9666 is assigned by IANA to zoomcp (Zoom Control Panel Game Server Management).
9666
How zoomcp works
GamingThe game client and server exchange small updates many times per second over port 9666.
- Transport
- TCP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- Gaming
Is port 9666 dangerous?
We have no specific security note for port 9666. Its risk depends on the program actually listening on it. General advice for gaming services:
IANA registry entries for port 9666
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| zoomcp | 9666 | TCP | Zoom Control Panel Game Server Management | - | 2014-02-26 |
| - | 9666 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 9666, and is it reachable?
Linux
sudo ss -ltnup 'sport = :9666' # process listening on 9666
sudo lsof -nP -i :9666macOS
sudo lsof -nP -i :9666
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9666 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 9666 netstat -ano | findstr :9666
From another machine
nmap -p 9666 -sV <host> nc -zv <host> 9666
Block it in the firewall
sudo ufw deny 9666/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 9666" -Direction Inbound -LocalPort 9666 -Protocol TCP -Action Block # Windows
What is port 9666 used for?
Port 9666 is assigned by IANA to zoomcp (Zoom Control Panel Game Server Management).
Is port 9666 TCP or UDP?
Port 9666 is registered for TCP.
Is it safe to open port 9666?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Keep game servers and their plugins updated.
How do I check if port 9666 is open?
On Linux run "ss -ltnup 'sport = :9666'", on macOS "lsof -nP -i :9666", and on Windows "netstat -ano | findstr :9666" to see the local process. From another machine, "nmap -p 9666 <host>" shows whether it is reachable.
Other gaming ports
:25565 Minecraft tcp · moderate risk :27015 Steam / Source engine udp · tcp · moderate risk :666 doom Id Software tcp · udp :1926 Evolution Game Server tcp · udp :2346 Game Connection Port tcp · udp :2347 Game Announcement and Location tcp · udp :2348 Information to query for game status tcp · udp :2914 Game Lobby tcp · udp