CyberHunter
Local dataset, no network
// Other services

Port 5203: TARGUS GetData 3

Port 5203 is assigned by IANA to targus-getdata3 (TARGUS GetData 3).

5203

How targus-getdata3 works

Other services
client:5203targus-getdata3response client:5203targus-getdata3response

The client sends a request to port 5203 and the targus-getdata3 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 5203 dangerous?

We have no specific security note for port 5203. 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 5203

ServicePortTransportDescriptionReferenceUpdated
targus-getdata3 5203 TCP, UDP TARGUS GetData 3 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5203, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5203'      # process listening on 5203
sudo lsof -nP -i :5203

macOS

sudo lsof -nP -i :5203

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5203 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5203
netstat -ano | findstr :5203

From another machine

nmap -p 5203 -sV <host>
sudo nmap -sU -p 5203 <host>
nc -zv <host> 5203

Block it in the firewall

sudo ufw deny 5203/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5203" -Direction Inbound -LocalPort 5203 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5203 used for?

Port 5203 is assigned by IANA to targus-getdata3 (TARGUS GetData 3).

Is port 5203 TCP or UDP?

Port 5203 is registered for TCP and UDP.

Is it safe to open port 5203?

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 5203 is open?

On Linux run "ss -ltnup 'sport = :5203'", on macOS "lsof -nP -i :5203", and on Windows "netstat -ano | findstr :5203" to see the local process. From another machine, "nmap -p 5203 <host>" shows whether it is reachable.

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