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// Other services

Port 1489: dmdocbroker

Port 1489 is assigned by IANA to dmdocbroker (dmdocbroker).

1489

How dmdocbroker works

Other services
client:1489dmdocbrokerresponse client:1489dmdocbrokerresponse

The client sends a request to port 1489 and the dmdocbroker 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 1489 dangerous?

We have no specific security note for port 1489. 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 1489

ServicePortTransportDescriptionReferenceUpdated
dmdocbroker 1489 TCP, UDP dmdocbroker - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1489, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1489'      # process listening on 1489
sudo lsof -nP -i :1489

macOS

sudo lsof -nP -i :1489

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1489 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1489
netstat -ano | findstr :1489

From another machine

nmap -p 1489 -sV <host>
sudo nmap -sU -p 1489 <host>
nc -zv <host> 1489

Block it in the firewall

sudo ufw deny 1489/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1489" -Direction Inbound -LocalPort 1489 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1489 used for?

Port 1489 is assigned by IANA to dmdocbroker (dmdocbroker).

Is port 1489 TCP or UDP?

Port 1489 is registered for TCP and UDP.

Is it safe to open port 1489?

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 1489 is open?

On Linux run "ss -ltnup 'sport = :1489'", on macOS "lsof -nP -i :1489", and on Windows "netstat -ano | findstr :1489" to see the local process. From another machine, "nmap -p 1489 <host>" shows whether it is reachable.

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