CyberHunter
Local dataset, no network
// Other services

Port 7725: Nitrogen Service

Port 7725 is assigned by IANA to nitrogen (Nitrogen Service).

7725

How nitrogen works

Other services
client:7725nitrogenresponse client:7725nitrogenresponse

The client sends a request to port 7725 and the nitrogen 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 7725 dangerous?

We have no specific security note for port 7725. 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 7725

ServicePortTransportDescriptionReferenceUpdated
nitrogen 7725 TCP, UDP Nitrogen Service - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 7725, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7725'      # process listening on 7725
sudo lsof -nP -i :7725

macOS

sudo lsof -nP -i :7725

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7725 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7725
netstat -ano | findstr :7725

From another machine

nmap -p 7725 -sV <host>
sudo nmap -sU -p 7725 <host>
nc -zv <host> 7725

Block it in the firewall

sudo ufw deny 7725/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7725" -Direction Inbound -LocalPort 7725 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7725 used for?

Port 7725 is assigned by IANA to nitrogen (Nitrogen Service).

Is port 7725 TCP or UDP?

Port 7725 is registered for TCP and UDP.

Is it safe to open port 7725?

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 7725 is open?

On Linux run "ss -ltnup 'sport = :7725'", on macOS "lsof -nP -i :7725", and on Windows "netstat -ano | findstr :7725" to see the local process. From another machine, "nmap -p 7725 <host>" shows whether it is reachable.

05 Related
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