CyberHunter
Local dataset, no network
// Other services

Port 2684: mpnjsosv

Port 2684 is assigned by IANA to mpnjsosv (mpnjsosv).

2684

How mpnjsosv works

Other services
client:2684mpnjsosvresponse client:2684mpnjsosvresponse

The client sends a request to port 2684 and the mpnjsosv 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 2684 dangerous?

We have no specific security note for port 2684. 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 2684

ServicePortTransportDescriptionReferenceUpdated
mpnjsosv 2684 TCP, UDP mpnjsosv - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2684, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2684'      # process listening on 2684
sudo lsof -nP -i :2684

macOS

sudo lsof -nP -i :2684

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2684 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2684
netstat -ano | findstr :2684

From another machine

nmap -p 2684 -sV <host>
sudo nmap -sU -p 2684 <host>
nc -zv <host> 2684

Block it in the firewall

sudo ufw deny 2684/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2684" -Direction Inbound -LocalPort 2684 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2684 used for?

Port 2684 is assigned by IANA to mpnjsosv (mpnjsosv).

Is port 2684 TCP or UDP?

Port 2684 is registered for TCP and UDP.

Is it safe to open port 2684?

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 2684 is open?

On Linux run "ss -ltnup 'sport = :2684'", on macOS "lsof -nP -i :2684", and on Windows "netstat -ano | findstr :2684" to see the local process. From another machine, "nmap -p 2684 <host>" shows whether it is reachable.

05 Related
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