CyberHunter
Local dataset, no network
// Other services

Port 4669: E-Port Data Service

Port 4669 is assigned by IANA to eportcommdata (E-Port Data Service).

4669

How eportcommdata works

Other services
client:4669eportcommdataresponse client:4669eportcommdataresponse

The client sends a request to port 4669 and the eportcommdata 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 4669 dangerous?

We have no specific security note for port 4669. 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 4669

ServicePortTransportDescriptionReferenceUpdated
eportcommdata 4669 TCP, UDP E-Port Data Service - 2006-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 4669, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4669'      # process listening on 4669
sudo lsof -nP -i :4669

macOS

sudo lsof -nP -i :4669

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4669 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4669
netstat -ano | findstr :4669

From another machine

nmap -p 4669 -sV <host>
sudo nmap -sU -p 4669 <host>
nc -zv <host> 4669

Block it in the firewall

sudo ufw deny 4669/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4669" -Direction Inbound -LocalPort 4669 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4669 used for?

Port 4669 is assigned by IANA to eportcommdata (E-Port Data Service).

Is port 4669 TCP or UDP?

Port 4669 is registered for TCP and UDP.

Is it safe to open port 4669?

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 4669 is open?

On Linux run "ss -ltnup 'sport = :4669'", on macOS "lsof -nP -i :4669", and on Windows "netstat -ano | findstr :4669" to see the local process. From another machine, "nmap -p 4669 <host>" shows whether it is reachable.

05 Related
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