Port 9668tec5 Spectral Device Control Protocol

TCP and UDP port 9668 is assigned to the tec5 Spectral Device Control Protocol.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as tec5-sdctp

Technical Details

what runs on :9668

tec5 Spectral Device Control Protocol is registered on port :9668 over tcp and udp to Michael Muth, assigned May 2009. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :9668

this machine

# linux
sudo ss -tulpn 'sport = :9668'

# macos / bsd
sudo lsof -nP -i :9668

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :9668

another host

nmap -sV -p T:9668 <host>
sudo nmap -sU -sV -p U:9668 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :9668

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

no security notes recorded for :9668 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :9668
service: tec5 Spectral Device Control Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 9668 to the tec5 Spectral Device Control Protocol. The assignment is registered to Michael Muth; public information about deployments is limited.
lookups: 0rank 993
added: 2026-10-16
updated: 2026-10-16
references: IANA service name registry — port 9668

Something wrong?

This record is maintained by the engineers who use port 9668. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-16.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :9668, by lookups.

port	service	proto	category	risk
:9618	HTCondor Collector	TCPUDP	Network Services	caution
:9695	Content-Centric Networking (CCNx)	TCPUDP	Network Services	safe
:9666	Zoom Control Panel Game Server Management	TCP	Remote Access	safe
:9616	eRunbook Agent	TCP	—	safe
:9628	ODBC Pathway Service	TCPUDP	Databases	safe
:9667	XMMS2	TCPUDP	Streaming	safe
:9694	T-Mobile Client Wakeup	TCPUDP	Mobile	safe
:9700	Board M.I.T. Service	TCPUDP	—	safe

risk mix of the 8 listed

safe88%
caution13%

0 of 8 encrypted

Port :9668tec5 Spectral Device Control Protocol

Technical Details

Security Information

Related Ports

Port 9668tec5 Spectral Device Control Protocol