CyberHunter
Local dataset, no network
// Other services

Port 3919: HyperIP

Port 3919 is assigned by IANA to hyperip (HyperIP).

3919

How hyperip works

Other services
client:3919hyperipresponse client:3919hyperipresponse

The client sends a request to port 3919 and the hyperip 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 3919 dangerous?

We have no specific security note for port 3919. 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 3919

ServicePortTransportDescriptionReferenceUpdated
hyperip 3919 TCP, UDP HyperIP - 2017-01-25

// source: IANA service name and port number registry

03 Check it

Which program uses port 3919, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3919'      # process listening on 3919
sudo lsof -nP -i :3919

macOS

sudo lsof -nP -i :3919

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3919 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3919
netstat -ano | findstr :3919

From another machine

nmap -p 3919 -sV <host>
sudo nmap -sU -p 3919 <host>
nc -zv <host> 3919

Block it in the firewall

sudo ufw deny 3919/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3919" -Direction Inbound -LocalPort 3919 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3919 used for?

Port 3919 is assigned by IANA to hyperip (HyperIP).

Is port 3919 TCP or UDP?

Port 3919 is registered for TCP and UDP.

Is it safe to open port 3919?

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 3919 is open?

On Linux run "ss -ltnup 'sport = :3919'", on macOS "lsof -nP -i :3919", and on Windows "netstat -ano | findstr :3919" to see the local process. From another machine, "nmap -p 3919 <host>" shows whether it is reachable.

05 Related
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