Port 474tn-tl-w2

An obscure UDP service identified as tn-tl-w2, with no public protocol details recorded.

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

1 other service is registered on port 474. compare all 2 →

Technical Details

what runs on :474

tn-tl-w2 is registered on port :474 over udp to Ed Kress. 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 :474

this machine

# linux
sudo ss -ulpn 'sport = :474'

# macos / bsd
sudo lsof -nP -i :474

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :474

another host

sudo nmap -sU -sV -p U:474 <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 :474

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

udp

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

security overview

no security notes recorded for :474 yet

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

Record

iana registry entry

port: :474
service: tn-tl-w2
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: tn-tl-w2 is an IANA-assigned UDP service name held by Ed Kress. No documented product, protocol behavior, or deployment context is available; it is rarely observed open on the public Internet.
lookups: 0rank 993
added: 2026-09-09
updated: 2026-09-09
references: IANA service name registry — port 474

Something wrong?

This record is maintained by the engineers who use port 474. 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 2026-09-09.

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 :474, by lookups.

port	service	proto	category	risk	views
:443	HTTPS	TCPtls	Web Services	caution	65.9k
:445	Microsoft-DS / SMB	TCP	File Transfer	caution	22.3k
:475	tcpnethaspsrv	TCP	Security	caution	20.7k
:502	Modbus Protocol	TCPUDP	Network Services	caution	19.2k
:427	Service Location Protocol	TCPUDP	Network Services	caution	14.6k
:533	Netwall Emergency Broadcasts	UDP	Security	caution	14.3k
:502	Modbus	TCPUDP	Network Services	caution	13.7k
:524	NetWare Core Protocol (NCP)	TCPUDP	Network Services	caution	11.5k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :474tn-tl-w2

Technical Details

Security Information

Related Ports

Port 474tn-tl-w2