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// Other services

Port 2252: NJENET using SSL

Port 2252 is assigned by IANA to njenet-ssl (NJENET using SSL).

2252

How njenet-ssl works

Other services
client:2252njenet-sslresponse client:2252njenet-sslresponse

The client sends a request to port 2252 and the njenet-ssl 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 2252 dangerous?

We have no specific security note for port 2252. 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 2252

ServicePortTransportDescriptionReferenceUpdated
njenet-ssl 2252 TCP, UDP NJENET using SSL - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2252, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2252'      # process listening on 2252
sudo lsof -nP -i :2252

macOS

sudo lsof -nP -i :2252

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2252 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2252
netstat -ano | findstr :2252

From another machine

nmap -p 2252 -sV <host>
sudo nmap -sU -p 2252 <host>
nc -zv <host> 2252

Block it in the firewall

sudo ufw deny 2252/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2252" -Direction Inbound -LocalPort 2252 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2252 used for?

Port 2252 is assigned by IANA to njenet-ssl (NJENET using SSL).

Is port 2252 TCP or UDP?

Port 2252 is registered for TCP and UDP.

Is it safe to open port 2252?

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 2252 is open?

On Linux run "ss -ltnup 'sport = :2252'", on macOS "lsof -nP -i :2252", and on Windows "netstat -ano | findstr :2252" to see the local process. From another machine, "nmap -p 2252 <host>" shows whether it is reachable.

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