CyberHunter
Local dataset, no network
// Other services

Port 4986: Model Railway Interface Program

Port 4986 is assigned by IANA to mrip (Model Railway Interface Program).

4986

How mrip works

Other services
client:4986mripresponse client:4986mripresponse

The client sends a request to port 4986 and the mrip 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 4986 dangerous?

We have no specific security note for port 4986. 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 4986

ServicePortTransportDescriptionReferenceUpdated
mrip 4986 TCP, UDP Model Railway Interface Program - 2006-04

// source: IANA service name and port number registry

03 Check it

Which program uses port 4986, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4986'      # process listening on 4986
sudo lsof -nP -i :4986

macOS

sudo lsof -nP -i :4986

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4986 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4986
netstat -ano | findstr :4986

From another machine

nmap -p 4986 -sV <host>
sudo nmap -sU -p 4986 <host>
nc -zv <host> 4986

Block it in the firewall

sudo ufw deny 4986/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4986" -Direction Inbound -LocalPort 4986 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4986 used for?

Port 4986 is assigned by IANA to mrip (Model Railway Interface Program).

Is port 4986 TCP or UDP?

Port 4986 is registered for TCP and UDP.

Is it safe to open port 4986?

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 4986 is open?

On Linux run "ss -ltnup 'sport = :4986'", on macOS "lsof -nP -i :4986", and on Windows "netstat -ano | findstr :4986" to see the local process. From another machine, "nmap -p 4986 <host>" shows whether it is reachable.

05 Related
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