CyberHunter
Local dataset, no network
// Other services

Port 3470: jt400

Port 3470 is assigned by IANA to jt400 (jt400).

3470

How jt400 works

Other services
client:3470jt400response client:3470jt400response

The client sends a request to port 3470 and the jt400 service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 3470 dangerous?

We have no specific security note for port 3470. 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 3470

ServicePortTransportDescriptionReferenceUpdated
jt400 3470 TCP, UDP jt400 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3470, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3470'      # process listening on 3470
sudo lsof -nP -i :3470

macOS

sudo lsof -nP -i :3470

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3470 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3470
netstat -ano | findstr :3470

From another machine

nmap -p 3470 -sV <host>
sudo nmap -sU -p 3470 <host>
nc -zv <host> 3470

Block it in the firewall

sudo ufw deny 3470/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3470" -Direction Inbound -LocalPort 3470 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3470 used for?

Port 3470 is assigned by IANA to jt400 (jt400).

Is port 3470 TCP or UDP?

Port 3470 is registered for TCP and UDP.

Is it safe to open port 3470?

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 3470 is open?

On Linux run "ss -ltnup 'sport = :3470'", on macOS "lsof -nP -i :3470", and on Windows "netstat -ano | findstr :3470" to see the local process. From another machine, "nmap -p 3470 <host>" shows whether it is reachable.

05 Related
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