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// Other services

Port 3884: SofTrack Metering

Port 3884 is assigned by IANA to softrack-meter (SofTrack Metering).

3884

How softrack-meter works

Other services
client:3884softrack-meterresponse client:3884softrack-meterresponse

The client sends a request to port 3884 and the softrack-meter 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 3884 dangerous?

We have no specific security note for port 3884. 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 3884

ServicePortTransportDescriptionReferenceUpdated
softrack-meter 3884 TCP, UDP SofTrack Metering - 2003-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 3884, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3884'      # process listening on 3884
sudo lsof -nP -i :3884

macOS

sudo lsof -nP -i :3884

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3884 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3884
netstat -ano | findstr :3884

From another machine

nmap -p 3884 -sV <host>
sudo nmap -sU -p 3884 <host>
nc -zv <host> 3884

Block it in the firewall

sudo ufw deny 3884/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3884" -Direction Inbound -LocalPort 3884 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3884 used for?

Port 3884 is assigned by IANA to softrack-meter (SofTrack Metering).

Is port 3884 TCP or UDP?

Port 3884 is registered for TCP and UDP.

Is it safe to open port 3884?

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 3884 is open?

On Linux run "ss -ltnup 'sport = :3884'", on macOS "lsof -nP -i :3884", and on Windows "netstat -ano | findstr :3884" to see the local process. From another machine, "nmap -p 3884 <host>" shows whether it is reachable.

05 Related
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