Port 4989Parallel for GAUSS

IANA assigns TCP and UDP port 4989 to Parallel for GAUSS.

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

also known as GAUSS Parallel

Technical Details

what runs on :4989

Parallel for GAUSS is registered on port :4989 over tcp and udp to Matthew Ford, assigned March 2003. 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 :4989

this machine

# linux
sudo ss -tulpn 'sport = :4989'

# macos / bsd
sudo lsof -nP -i :4989

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4989

another host

nmap -sV -p T:4989 <host>
sudo nmap -sU -sV -p U:4989 <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 :4989

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 :4989 yet

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

Record

iana registry entry

port: :4989
service: Parallel for GAUSS
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA assignment is “Parallel for GAUSS (tm),” registered to Matthew Ford in 2003. No widely established deployment or common real-world use is known.
lookups: 0rank 993
added: 2026-10-06
updated: 2026-10-06
references: IANA service name registry — port 4989

Something wrong?

This record is maintained by the engineers who use port 4989. 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 2026-10-06.

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 :4989, by lookups.

port	service	proto	category	risk	views
:5001	Iperf	TCPUDP	Network Services	caution	27.7k
:5001	Commplex-Link	TCP	Network Services	caution	24.9k
:5001	Slingbox	TCP	Streaming	caution	22.4k
:5000	Commplex Main	TCP	Web Services	caution	15.4k
:5004	RTP Media Data	TCP	Streaming	safe	13.0k
:5000	UPnP Device Interop	TCP	Network Services	caution	12.7k
:5031	AVM CAPI-over-TCP	TCPUDP	Network Services	caution	12.0k
:4993	Home FTP Server Web UI	TCPUDP	Web Services	caution	11.1k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :4989Parallel for GAUSS

Technical Details

Security Information

Related Ports

Port 4989Parallel for GAUSS