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// Other services

Port 4402: ASIGRA Televaulting DS-Client Service

Port 4402 is assigned by IANA to ds-clnt (ASIGRA Televaulting DS-Client Service).

4402

How ds-clnt works

Other services
client:4402ds-clntresponse client:4402ds-clntresponse

The client sends a request to port 4402 and the ds-clnt 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 4402 dangerous?

We have no specific security note for port 4402. 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 4402

ServicePortTransportDescriptionReferenceUpdated
ds-clnt 4402 TCP, UDP ASIGRA Televaulting DS-Client Service - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4402, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4402'      # process listening on 4402
sudo lsof -nP -i :4402

macOS

sudo lsof -nP -i :4402

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4402 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4402
netstat -ano | findstr :4402

From another machine

nmap -p 4402 -sV <host>
sudo nmap -sU -p 4402 <host>
nc -zv <host> 4402

Block it in the firewall

sudo ufw deny 4402/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4402" -Direction Inbound -LocalPort 4402 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4402 used for?

Port 4402 is assigned by IANA to ds-clnt (ASIGRA Televaulting DS-Client Service).

Is port 4402 TCP or UDP?

Port 4402 is registered for TCP and UDP.

Is it safe to open port 4402?

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 4402 is open?

On Linux run "ss -ltnup 'sport = :4402'", on macOS "lsof -nP -i :4402", and on Windows "netstat -ano | findstr :4402" to see the local process. From another machine, "nmap -p 4402 <host>" shows whether it is reachable.

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