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// Other services

Port 474: tn-tl-w1

Port 474 is assigned by IANA to tn-tl-w1 (tn-tl-w1), tn-tl-w2 (tn-tl-w2).

474

How tn-tl-w1 works

Other services
client:474tn-tl-w1response client:474tn-tl-w1response

The client sends a request to port 474 and the tn-tl-w1 service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Well-known (0-1023)
Category
Other services
01 Security

Is port 474 dangerous?

We have no specific security note for port 474. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 474

ServicePortTransportDescriptionReferenceUpdated
tn-tl-w1 474 TCP tn-tl-w1 - -
tn-tl-w2 474 UDP tn-tl-w2 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 474, and is it reachable?

Linux

sudo ss -ltnup 'sport = :474'      # process listening on 474
sudo lsof -nP -i :474

macOS

sudo lsof -nP -i :474

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 474 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 474
netstat -ano | findstr :474

From another machine

nmap -p 474 -sV <host>
sudo nmap -sU -p 474 <host>
nc -zv <host> 474

Block it in the firewall

sudo ufw deny 474/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 474" -Direction Inbound -LocalPort 474 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 474 used for?

Port 474 is assigned by IANA to tn-tl-w1 (tn-tl-w1), tn-tl-w2 (tn-tl-w2).

Is port 474 TCP or UDP?

Port 474 is registered for TCP and UDP.

Is it safe to open port 474?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 474 is open?

On Linux run "ss -ltnup 'sport = :474'", on macOS "lsof -nP -i :474", and on Windows "netstat -ano | findstr :474" to see the local process. From another machine, "nmap -p 474 <host>" shows whether it is reachable.

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