Port 6242JEOL Network Services Dynamic Discovery Protocol 2

UDP/6242 is assigned to JEOL Network Services Dynamic Discovery Protocol 2, a JEOL device-discovery service.

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

also known as jeol-nsddp-2

1 other service is registered on port 6242. compare all 2 →

Technical Details

what runs on :6242

JEOL Network Services Dynamic Discovery Protocol 2 is registered on port :6242 over udp to Kevin Wellwood, assigned April 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 :6242

this machine

# linux
sudo ss -ulpn 'sport = :6242'

# macos / bsd
sudo lsof -nP -i :6242

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :6242

another host

sudo nmap -sU -sV -p U:6242 <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 :6242

risk score

1/ 10safe

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

network services averages 2.6 across 1,699 ports — this one sits 1.6 below.

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

udp

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

security overview

no security notes recorded for :6242 yet

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

Record

iana registry entry

port: :6242
service: JEOL Network Services Dynamic Discovery Protocol 2
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Network Services
usage: The IANA assignment identifies this as JEOL Network Services Dynamic Discovery Protocol 2. It was registered to Kevin Wellwood; public information is too limited to describe deployments or protocol behavior confidently.
lookups: 0rank 993
added: 2026-10-10
updated: 2026-10-10
references: IANA service name registry — port 6242

Something wrong?

This record is maintained by the engineers who use port 6242. 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 2026-10-10.

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

all 1,699 in network services →

the 8 most looked-up other ports in network services — 1,699 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :6242JEOL Network Services Dynamic Discovery Protocol 2

Technical Details

Security Information

Related Ports

Port 6242JEOL Network Services Dynamic Discovery Protocol 2