CyberHunter
Local dataset, no network
// Other services

Port 2685: mpnjsocl

Port 2685 is assigned by IANA to mpnjsocl (mpnjsocl).

2685

How mpnjsocl works

Other services
client:2685mpnjsoclresponse client:2685mpnjsoclresponse

The client sends a request to port 2685 and the mpnjsocl 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 2685 dangerous?

We have no specific security note for port 2685. 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 2685

ServicePortTransportDescriptionReferenceUpdated
mpnjsocl 2685 TCP, UDP mpnjsocl - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2685, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2685'      # process listening on 2685
sudo lsof -nP -i :2685

macOS

sudo lsof -nP -i :2685

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2685 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2685
netstat -ano | findstr :2685

From another machine

nmap -p 2685 -sV <host>
sudo nmap -sU -p 2685 <host>
nc -zv <host> 2685

Block it in the firewall

sudo ufw deny 2685/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2685" -Direction Inbound -LocalPort 2685 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2685 used for?

Port 2685 is assigned by IANA to mpnjsocl (mpnjsocl).

Is port 2685 TCP or UDP?

Port 2685 is registered for TCP and UDP.

Is it safe to open port 2685?

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 2685 is open?

On Linux run "ss -ltnup 'sport = :2685'", on macOS "lsof -nP -i :2685", and on Windows "netstat -ano | findstr :2685" to see the local process. From another machine, "nmap -p 2685 <host>" shows whether it is reachable.

05 Related
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