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// Other services

Port 4686: Manina Service Protocol

Port 4686 is assigned by IANA to msp-os (Manina Service Protocol).

4686

How msp-os works

Other services
client:4686msp-osresponse client:4686msp-osresponse

The client sends a request to port 4686 and the msp-os 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 4686 dangerous?

We have no specific security note for port 4686. 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 4686

ServicePortTransportDescriptionReferenceUpdated
msp-os 4686 TCP, UDP Manina Service Protocol - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 4686, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4686'      # process listening on 4686
sudo lsof -nP -i :4686

macOS

sudo lsof -nP -i :4686

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4686 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4686
netstat -ano | findstr :4686

From another machine

nmap -p 4686 -sV <host>
sudo nmap -sU -p 4686 <host>
nc -zv <host> 4686

Block it in the firewall

sudo ufw deny 4686/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4686" -Direction Inbound -LocalPort 4686 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4686 used for?

Port 4686 is assigned by IANA to msp-os (Manina Service Protocol).

Is port 4686 TCP or UDP?

Port 4686 is registered for TCP and UDP.

Is it safe to open port 4686?

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 4686 is open?

On Linux run "ss -ltnup 'sport = :4686'", on macOS "lsof -nP -i :4686", and on Windows "netstat -ano | findstr :4686" to see the local process. From another machine, "nmap -p 4686 <host>" shows whether it is reachable.

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