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// Other services

Port 2987: identify

Port 2987 is assigned by IANA to identify (identify).

2987

How identify works

Other services
client:2987identifyresponse client:2987identifyresponse

The client sends a request to port 2987 and the identify 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 2987 dangerous?

We have no specific security note for port 2987. 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 2987

ServicePortTransportDescriptionReferenceUpdated
identify 2987 TCP, UDP identify - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2987, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2987'      # process listening on 2987
sudo lsof -nP -i :2987

macOS

sudo lsof -nP -i :2987

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2987 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2987
netstat -ano | findstr :2987

From another machine

nmap -p 2987 -sV <host>
sudo nmap -sU -p 2987 <host>
nc -zv <host> 2987

Block it in the firewall

sudo ufw deny 2987/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2987" -Direction Inbound -LocalPort 2987 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2987 used for?

Port 2987 is assigned by IANA to identify (identify).

Is port 2987 TCP or UDP?

Port 2987 is registered for TCP and UDP.

Is it safe to open port 2987?

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 2987 is open?

On Linux run "ss -ltnup 'sport = :2987'", on macOS "lsof -nP -i :2987", and on Windows "netstat -ano | findstr :2987" to see the local process. From another machine, "nmap -p 2987 <host>" shows whether it is reachable.

05 Related
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