Port 9668

tec5-sdctp · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicetec5-sdctp
Registered2009-05-11

Frequently asked questions

What is port 9668 used for?

Port 9668 is registered with the IANA for tec5-sdctp (TCP/UDP). Description: tec5 Spectral Device Control Protocol.

Is port 9668 a well-known port?

No. Port 9668 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 9668 is open?

Locally on Linux with ss -tulpn | grep ':9668\b', on Windows with netstat -ano | findstr :9668. To test a remote host use Test-NetConnection <host> -Port 9668 in PowerShell or nc -zv <host> 9668 on Linux/macOS.

How do I open port 9668 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 9668/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9668/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9668" -Direction Inbound -Protocol TCP -LocalPort 9668 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPtec5-sdctptec5 Spectral Device Control Protocol
UDPtec5-sdctptec5 Spectral Device Control Protocol

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