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// Other services

Port 4670: Light packets transfer protocol

Port 4670 is assigned by IANA to light (Light packets transfer protocol).

4670

How light works

Other services
client:4670lightresponse client:4670lightresponse

The client sends a request to port 4670 and the light 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 4670 dangerous?

We have no specific security note for port 4670. 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 4670

ServicePortTransportDescriptionReferenceUpdated
light 4670 TCP, UDP Light packets transfer protocol - 2006-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 4670, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4670'      # process listening on 4670
sudo lsof -nP -i :4670

macOS

sudo lsof -nP -i :4670

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4670 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4670
netstat -ano | findstr :4670

From another machine

nmap -p 4670 -sV <host>
sudo nmap -sU -p 4670 <host>
nc -zv <host> 4670

Block it in the firewall

sudo ufw deny 4670/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4670" -Direction Inbound -LocalPort 4670 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4670 used for?

Port 4670 is assigned by IANA to light (Light packets transfer protocol).

Is port 4670 TCP or UDP?

Port 4670 is registered for TCP and UDP.

Is it safe to open port 4670?

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 4670 is open?

On Linux run "ss -ltnup 'sport = :4670'", on macOS "lsof -nP -i :4670", and on Windows "netstat -ano | findstr :4670" to see the local process. From another machine, "nmap -p 4670 <host>" shows whether it is reachable.

05 Related
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