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// Other services

Port 8889: Desktop Data TCP 1

Port 8889 is assigned by IANA to ddi-tcp-2 (Desktop Data TCP 1), ddi-udp-2 (NewsEDGE server broadcast).

8889

How ddi-tcp-2 works

Other services
client:8889ddi-tcp-2response client:8889ddi-tcp-2response

The client sends a request to port 8889 and the ddi-tcp-2 service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 8889 dangerous?

We have no specific security note for port 8889. 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 8889

ServicePortTransportDescriptionReferenceUpdated
ddi-tcp-2 8889 TCP Desktop Data TCP 1
Reported: Known Unauthorized Use on port 8889
 - -
ddi-udp-2 8889 UDP NewsEDGE server broadcast
Reported: Known Unauthorized Use on port 8889
 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8889, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8889'      # process listening on 8889
sudo lsof -nP -i :8889

macOS

sudo lsof -nP -i :8889

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8889 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8889
netstat -ano | findstr :8889

From another machine

nmap -p 8889 -sV <host>
sudo nmap -sU -p 8889 <host>
nc -zv <host> 8889

Block it in the firewall

sudo ufw deny 8889/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8889" -Direction Inbound -LocalPort 8889 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8889 used for?

Port 8889 is assigned by IANA to ddi-tcp-2 (Desktop Data TCP 1), ddi-udp-2 (NewsEDGE server broadcast).

Is port 8889 TCP or UDP?

Port 8889 is registered for TCP and UDP.

Is it safe to open port 8889?

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 8889 is open?

On Linux run "ss -ltnup 'sport = :8889'", on macOS "lsof -nP -i :8889", and on Windows "netstat -ano | findstr :8889" to see the local process. From another machine, "nmap -p 8889 <host>" shows whether it is reachable.

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