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// Other services

Port 8890: Desktop Data TCP 2

Port 8890 is assigned by IANA to ddi-tcp-3 (Desktop Data TCP 2), ddi-udp-3 (NewsEDGE client broadcast).

8890

How ddi-tcp-3 works

Other services
client:8890ddi-tcp-3response client:8890ddi-tcp-3response

The client sends a request to port 8890 and the ddi-tcp-3 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 8890 dangerous?

We have no specific security note for port 8890. 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 8890

ServicePortTransportDescriptionReferenceUpdated
ddi-tcp-3 8890 TCP Desktop Data TCP 2
Reported: Known Unauthorized Use on port 8890
 - -
ddi-udp-3 8890 UDP NewsEDGE client broadcast
Reported: Known Unauthorized Use on port 8890
 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8890, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8890'      # process listening on 8890
sudo lsof -nP -i :8890

macOS

sudo lsof -nP -i :8890

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8890 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8890
netstat -ano | findstr :8890

From another machine

nmap -p 8890 -sV <host>
sudo nmap -sU -p 8890 <host>
nc -zv <host> 8890

Block it in the firewall

sudo ufw deny 8890/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8890" -Direction Inbound -LocalPort 8890 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8890 used for?

Port 8890 is assigned by IANA to ddi-tcp-3 (Desktop Data TCP 2), ddi-udp-3 (NewsEDGE client broadcast).

Is port 8890 TCP or UDP?

Port 8890 is registered for TCP and UDP.

Is it safe to open port 8890?

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 8890 is open?

On Linux run "ss -ltnup 'sport = :8890'", on macOS "lsof -nP -i :8890", and on Windows "netstat -ano | findstr :8890" to see the local process. From another machine, "nmap -p 8890 <host>" shows whether it is reachable.

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