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// Other services

Port 25902: NILinkAnalyst

Port 25902 is assigned by IANA to nilinkanalyst (NILinkAnalyst).

25902

How nilinkanalyst works

Other services
client:25902nilinkanalystresponse client:25902nilinkanalystresponse

The client sends a request to port 25902 and the nilinkanalyst 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 25902 dangerous?

We have no specific security note for port 25902. 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 25902

ServicePortTransportDescriptionReferenceUpdated
nilinkanalyst 25902 TCP, UDP NILinkAnalyst - 2007-08-30

// source: IANA service name and port number registry

03 Check it

Which program uses port 25902, and is it reachable?

Linux

sudo ss -ltnup 'sport = :25902'      # process listening on 25902
sudo lsof -nP -i :25902

macOS

sudo lsof -nP -i :25902

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 25902 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 25902
netstat -ano | findstr :25902

From another machine

nmap -p 25902 -sV <host>
sudo nmap -sU -p 25902 <host>
nc -zv <host> 25902

Block it in the firewall

sudo ufw deny 25902/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 25902" -Direction Inbound -LocalPort 25902 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 25902 used for?

Port 25902 is assigned by IANA to nilinkanalyst (NILinkAnalyst).

Is port 25902 TCP or UDP?

Port 25902 is registered for TCP and UDP.

Is it safe to open port 25902?

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 25902 is open?

On Linux run "ss -ltnup 'sport = :25902'", on macOS "lsof -nP -i :25902", and on Windows "netstat -ano | findstr :25902" to see the local process. From another machine, "nmap -p 25902 <host>" shows whether it is reachable.

05 Related
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