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// Other services

Port 3628: EPT Machine Interface

Port 3628 is assigned by IANA to ept-machine (EPT Machine Interface).

3628

How ept-machine works

Other services
client:3628ept-machineresponse client:3628ept-machineresponse

The client sends a request to port 3628 and the ept-machine 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 3628 dangerous?

We have no specific security note for port 3628. 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 3628

ServicePortTransportDescriptionReferenceUpdated
ept-machine 3628 TCP, UDP EPT Machine Interface - 2002-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 3628, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3628'      # process listening on 3628
sudo lsof -nP -i :3628

macOS

sudo lsof -nP -i :3628

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3628 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3628
netstat -ano | findstr :3628

From another machine

nmap -p 3628 -sV <host>
sudo nmap -sU -p 3628 <host>
nc -zv <host> 3628

Block it in the firewall

sudo ufw deny 3628/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3628" -Direction Inbound -LocalPort 3628 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3628 used for?

Port 3628 is assigned by IANA to ept-machine (EPT Machine Interface).

Is port 3628 TCP or UDP?

Port 3628 is registered for TCP and UDP.

Is it safe to open port 3628?

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 3628 is open?

On Linux run "ss -ltnup 'sport = :3628'", on macOS "lsof -nP -i :3628", and on Windows "netstat -ano | findstr :3628" to see the local process. From another machine, "nmap -p 3628 <host>" shows whether it is reachable.

05 Related
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