Port 3003CGMS

CGMS is an obscure service assigned to TCP and UDP port 3003; its protocol is not documented in the registry.

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

1 other service is registered on port 3003. compare all 2 →

Technical Details

what runs on :3003

CGMS is registered on port :3003 over tcp and udp to Corey Clinton, assigned February 2011. 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 found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :3003

this machine

# linux
sudo ss -tulpn 'sport = :3003'

# macos / bsd
sudo lsof -nP -i :3003

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3003

another host

nmap -sV -p T:3003 <host>
sudo nmap -sU -sV -p U:3003 <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 :3003

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 :3003 yet

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

Record

iana registry entry

port: :3003
service: CGMS
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA registry assigns the CGMS service to TCP and UDP port 3003. The assignment is registered to Corey Clinton, but the registry provides no further information about deployments or software using it.
lookups: 0rank 993
added: 2026-09-04
updated: 2026-09-04
references: IANA service name registry — port 3003

Something wrong?

This record is maintained by the engineers who use port 3003. 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 2026-09-04.

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 :3003, by lookups.

port	service	proto	category	risk	views
:3001	Miralix Phone Monitor	TCP	Network Services	caution	21.7k
:3001	Opsware Satellite	TCP	Network Services	caution	17.4k
:3000	Miralix License Server	TCP	Network Services	caution	15.4k
:3008	Miralix Proxy	TCPtls	Security	caution	12.8k
:3000	Distributed Interactive Simulation	UDP	Network Services	caution	11.7k
:2948	WAP Push MMS	TCPUDP	Network Services	safe	11.7k
:3017	Miralix IVR & Voicemail	TCP	Network Services	caution	11.5k
:3006	Miralix SMS Connector	TCP	Mobile	caution	11.3k

risk mix of the 8 listed

safe13%
caution88%

1 of 8 encrypted

Port :3003CGMS

Technical Details

Security Information

Related Ports

Port 3003CGMS