Port 9000CSlistener

CSlistener is the service name assigned to TCP and UDP port 9000.

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

4 other services are registered on port 9000. compare all 5 →

Technical Details

what runs on :9000

CSlistener is registered on port :9000 over tcp and udp to David Jones. 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 sometimes. What's listening is often not the registered service, so check before you assume.

find what's listening on :9000

this machine

# linux
sudo ss -tulpn 'sport = :9000'

# macos / bsd
sudo lsof -nP -i :9000

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :9000

another host

nmap -sV -p T:9000 <host>
sudo nmap -sU -sV -p U:9000 <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 :9000

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 :9000 yet

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

Record

iana registry entry

port: :9000
service: CSlistener
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 9000 to the service named CSlistener. The assignment is registered to David Jones, but no product, protocol, or deployment context is recorded.
lookups: 0rank 993
added: 2026-08-20
updated: 2026-08-20
references: IANA service name registry — port 9000

Something wrong?

This record is maintained by the engineers who use port 9000. 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 2026-08-20.

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 :9000, by lookups.

port	service	proto	category	risk	views
:9001	ETL Service Manager	TCPUDP	Databases	caution	28.6k
:9043	WebSphere Admin Console (SSL)	TCP	Web Services	caution	28.0k
:9001	SharePoint Authoring		Web Services	caution	26.3k
:9001	DBGp Proxy	TCPtls	Network Services	caution	25.5k
:9001	Tor Network		Security	caution	23.7k
:9001	Cisco XRemote		Remote Access	caution	23.7k
:9060	WebSphere Admin Console	TCP	Web Services	caution	23.0k
:9009	Pichat Server	TCPUDP	Network Services	caution	19.7k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :9000CSlistener

Technical Details

Security Information

Related Ports

Port 9000CSlistener