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// Other services

Port 4689: Altova DatabaseCentral

Port 4689 is assigned by IANA to altovacentral (Altova DatabaseCentral).

4689

How altovacentral works

Other services
client:4689altovacentralresponse client:4689altovacentralresponse

The client sends a request to port 4689 and the altovacentral 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 4689 dangerous?

We have no specific security note for port 4689. 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 4689

ServicePortTransportDescriptionReferenceUpdated
altovacentral 4689 TCP, UDP Altova DatabaseCentral - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 4689, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4689'      # process listening on 4689
sudo lsof -nP -i :4689

macOS

sudo lsof -nP -i :4689

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4689 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4689
netstat -ano | findstr :4689

From another machine

nmap -p 4689 -sV <host>
sudo nmap -sU -p 4689 <host>
nc -zv <host> 4689

Block it in the firewall

sudo ufw deny 4689/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4689" -Direction Inbound -LocalPort 4689 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4689 used for?

Port 4689 is assigned by IANA to altovacentral (Altova DatabaseCentral).

Is port 4689 TCP or UDP?

Port 4689 is registered for TCP and UDP.

Is it safe to open port 4689?

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 4689 is open?

On Linux run "ss -ltnup 'sport = :4689'", on macOS "lsof -nP -i :4689", and on Windows "netstat -ano | findstr :4689" to see the local process. From another machine, "nmap -p 4689 <host>" shows whether it is reachable.

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