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// Other services

Port 8894: Desktop Data TCP 6: COAL application

Port 8894 is assigned by IANA to ddi-tcp-7 (Desktop Data TCP 6: COAL application), ddi-udp-7 (Desktop Data UDP 6: COAL application).

8894

How ddi-tcp-7 works

Other services
client:8894ddi-tcp-7response client:8894ddi-tcp-7response

The client sends a request to port 8894 and the ddi-tcp-7 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 8894 dangerous?

We have no specific security note for port 8894. 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 8894

ServicePortTransportDescriptionReferenceUpdated
ddi-tcp-7 8894 TCP Desktop Data TCP 6: COAL application - -
ddi-udp-7 8894 UDP Desktop Data UDP 6: COAL application - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8894, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8894'      # process listening on 8894
sudo lsof -nP -i :8894

macOS

sudo lsof -nP -i :8894

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8894 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8894
netstat -ano | findstr :8894

From another machine

nmap -p 8894 -sV <host>
sudo nmap -sU -p 8894 <host>
nc -zv <host> 8894

Block it in the firewall

sudo ufw deny 8894/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8894" -Direction Inbound -LocalPort 8894 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8894 used for?

Port 8894 is assigned by IANA to ddi-tcp-7 (Desktop Data TCP 6: COAL application), ddi-udp-7 (Desktop Data UDP 6: COAL application).

Is port 8894 TCP or UDP?

Port 8894 is registered for TCP and UDP.

Is it safe to open port 8894?

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 8894 is open?

On Linux run "ss -ltnup 'sport = :8894'", on macOS "lsof -nP -i :8894", and on Windows "netstat -ano | findstr :8894" to see the local process. From another machine, "nmap -p 8894 <host>" shows whether it is reachable.

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