CyberHunter
Local dataset, no network
// Other services

Port 2565: Coordinator Server

Port 2565 is assigned by IANA to coord-svr (Coordinator Server).

2565

How coord-svr works

Other services
client:2565coord-svrresponse client:2565coord-svrresponse

The client sends a request to port 2565 and the coord-svr 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 2565 dangerous?

We have no specific security note for port 2565. 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 2565

ServicePortTransportDescriptionReferenceUpdated
coord-svr 2565 TCP, UDP Coordinator Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2565, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2565'      # process listening on 2565
sudo lsof -nP -i :2565

macOS

sudo lsof -nP -i :2565

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2565 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2565
netstat -ano | findstr :2565

From another machine

nmap -p 2565 -sV <host>
sudo nmap -sU -p 2565 <host>
nc -zv <host> 2565

Block it in the firewall

sudo ufw deny 2565/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2565" -Direction Inbound -LocalPort 2565 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2565 used for?

Port 2565 is assigned by IANA to coord-svr (Coordinator Server).

Is port 2565 TCP or UDP?

Port 2565 is registered for TCP and UDP.

Is it safe to open port 2565?

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 2565 is open?

On Linux run "ss -ltnup 'sport = :2565'", on macOS "lsof -nP -i :2565", and on Windows "netstat -ano | findstr :2565" to see the local process. From another machine, "nmap -p 2565 <host>" shows whether it is reachable.

05 Related
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