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// Other services

Port 2875: DX Message Base Transport Protocol

Port 2875 is assigned by IANA to dxmessagebase2 (DX Message Base Transport Protocol).

2875

How dxmessagebase2 works

Other services
client:2875dxmessagebase2response client:2875dxmessagebase2response

The client sends a request to port 2875 and the dxmessagebase2 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 2875 dangerous?

We have no specific security note for port 2875. 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 2875

ServicePortTransportDescriptionReferenceUpdated
dxmessagebase2 2875 TCP, UDP DX Message Base Transport Protocol - 2009-01-13

// source: IANA service name and port number registry

03 Check it

Which program uses port 2875, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2875'      # process listening on 2875
sudo lsof -nP -i :2875

macOS

sudo lsof -nP -i :2875

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2875 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2875
netstat -ano | findstr :2875

From another machine

nmap -p 2875 -sV <host>
sudo nmap -sU -p 2875 <host>
nc -zv <host> 2875

Block it in the firewall

sudo ufw deny 2875/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2875" -Direction Inbound -LocalPort 2875 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2875 used for?

Port 2875 is assigned by IANA to dxmessagebase2 (DX Message Base Transport Protocol).

Is port 2875 TCP or UDP?

Port 2875 is registered for TCP and UDP.

Is it safe to open port 2875?

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 2875 is open?

On Linux run "ss -ltnup 'sport = :2875'", on macOS "lsof -nP -i :2875", and on Windows "netstat -ano | findstr :2875" to see the local process. From another machine, "nmap -p 2875 <host>" shows whether it is reachable.

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