Port 2003Brutus Server

Brutus Server is the IANA-registered service assigned to TCP and UDP port 2003.

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

Technical Details

what runs on :2003

Brutus Server is registered on port :2003 over tcp and udp to Johannes Skov Frands, assigned February 2008. 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 :2003

this machine

# linux
sudo ss -tulpn 'sport = :2003'

# macos / bsd
sudo lsof -nP -i :2003

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :2003

another host

nmap -sV -p T:2003 <host>
sudo nmap -sU -sV -p U:2003 <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 :2003

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 :2003 yet

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

Record

iana registry entry

port: :2003
service: Brutus Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 2003 to the Brutus Server service, registered to Johannes Skov Frands in 2008. No established public deployment or protocol details are available from the assignment.
lookups: 0rank 993
added: 2026-09-20
updated: 2026-09-20
references: IANA service name registry — port 2003

Something wrong?

This record is maintained by the engineers who use port 2003. 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 2026-09-20.

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 :2003, by lookups.

port	service	proto	category	risk	views
:2031	Mobrien Chat	TCPUDP	Web Services	caution	27.7k
:2053	knetd Demultiplexer	TCP	Security	safe	17.2k
:1984	Big Brother Monitor	TCP	Security	caution	16.8k
:1947	Aladdin HASP License Manager	TCP	Security	caution	15.4k
:1967	Cisco IP SLA Control	UDP	Network Services	caution	13.2k
:2053	Lot105 DSuper Updates	UDP	Network Services	caution	12.4k
:2030	Oracle MS Transaction Server		Databases	caution	12.2k
:2001	CAPTAN Test Stand	UDP	System	caution	11.8k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :2003Brutus Server

Technical Details

Security Information

Related Ports

Port 2003Brutus Server