CyberHunter
Local dataset, no network
// Other services

Port 2719: Scan & Change

Port 2719 is assigned by IANA to scan-change (Scan & Change).

2719

How scan-change works

Other services
client:2719scan-changeresponse client:2719scan-changeresponse

The client sends a request to port 2719 and the scan-change 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 2719 dangerous?

We have no specific security note for port 2719. 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 2719

ServicePortTransportDescriptionReferenceUpdated
scan-change 2719 TCP, UDP Scan & Change - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2719, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2719'      # process listening on 2719
sudo lsof -nP -i :2719

macOS

sudo lsof -nP -i :2719

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2719 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2719
netstat -ano | findstr :2719

From another machine

nmap -p 2719 -sV <host>
sudo nmap -sU -p 2719 <host>
nc -zv <host> 2719

Block it in the firewall

sudo ufw deny 2719/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2719" -Direction Inbound -LocalPort 2719 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2719 used for?

Port 2719 is assigned by IANA to scan-change (Scan & Change).

Is port 2719 TCP or UDP?

Port 2719 is registered for TCP and UDP.

Is it safe to open port 2719?

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 2719 is open?

On Linux run "ss -ltnup 'sport = :2719'", on macOS "lsof -nP -i :2719", and on Windows "netstat -ano | findstr :2719" to see the local process. From another machine, "nmap -p 2719 <host>" shows whether it is reachable.

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