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// Other services

Port 2487: Policy Notice Service

Port 2487 is assigned by IANA to pns (Policy Notice Service).

2487

How pns works

Other services
client:2487pnsresponse client:2487pnsresponse

The client sends a request to port 2487 and the pns 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 2487 dangerous?

We have no specific security note for port 2487. 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 2487

ServicePortTransportDescriptionReferenceUpdated
pns 2487 TCP, UDP Policy Notice Service - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2487, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2487'      # process listening on 2487
sudo lsof -nP -i :2487

macOS

sudo lsof -nP -i :2487

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2487 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2487
netstat -ano | findstr :2487

From another machine

nmap -p 2487 -sV <host>
sudo nmap -sU -p 2487 <host>
nc -zv <host> 2487

Block it in the firewall

sudo ufw deny 2487/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2487" -Direction Inbound -LocalPort 2487 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2487 used for?

Port 2487 is assigned by IANA to pns (Policy Notice Service).

Is port 2487 TCP or UDP?

Port 2487 is registered for TCP and UDP.

Is it safe to open port 2487?

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 2487 is open?

On Linux run "ss -ltnup 'sport = :2487'", on macOS "lsof -nP -i :2487", and on Windows "netstat -ano | findstr :2487" to see the local process. From another machine, "nmap -p 2487 <host>" shows whether it is reachable.

05 Related
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