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// Other services

Port 419: Ariel 1

Port 419 is assigned by IANA to ariel1 (Ariel 1).

419

How ariel1 works

Other services
client:419ariel1response client:419ariel1response

The client sends a request to port 419 and the ariel1 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 419 dangerous?

We have no specific security note for port 419. 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 419

ServicePortTransportDescriptionReferenceUpdated
ariel1 419 TCP, UDP Ariel 1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 419, and is it reachable?

Linux

sudo ss -ltnup 'sport = :419'      # process listening on 419
sudo lsof -nP -i :419

macOS

sudo lsof -nP -i :419

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 419 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 419
netstat -ano | findstr :419

From another machine

nmap -p 419 -sV <host>
sudo nmap -sU -p 419 <host>
nc -zv <host> 419

Block it in the firewall

sudo ufw deny 419/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 419" -Direction Inbound -LocalPort 419 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 419 used for?

Port 419 is assigned by IANA to ariel1 (Ariel 1).

Is port 419 TCP or UDP?

Port 419 is registered for TCP and UDP.

Is it safe to open port 419?

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 419 is open?

On Linux run "ss -ltnup 'sport = :419'", on macOS "lsof -nP -i :419", and on Windows "netstat -ano | findstr :419" to see the local process. From another machine, "nmap -p 419 <host>" shows whether it is reachable.

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