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// Other services

Port 3619: AAIR-Network 2

Port 3619 is assigned by IANA to aairnet-2 (AAIR-Network 2).

3619

How aairnet-2 works

Other services
client:3619aairnet-2response client:3619aairnet-2response

The client sends a request to port 3619 and the aairnet-2 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 3619 dangerous?

We have no specific security note for port 3619. 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 3619

ServicePortTransportDescriptionReferenceUpdated
aairnet-2 3619 TCP, UDP AAIR-Network 2 - 2002-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 3619, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3619'      # process listening on 3619
sudo lsof -nP -i :3619

macOS

sudo lsof -nP -i :3619

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3619 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3619
netstat -ano | findstr :3619

From another machine

nmap -p 3619 -sV <host>
sudo nmap -sU -p 3619 <host>
nc -zv <host> 3619

Block it in the firewall

sudo ufw deny 3619/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3619" -Direction Inbound -LocalPort 3619 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3619 used for?

Port 3619 is assigned by IANA to aairnet-2 (AAIR-Network 2).

Is port 3619 TCP or UDP?

Port 3619 is registered for TCP and UDP.

Is it safe to open port 3619?

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 3619 is open?

On Linux run "ss -ltnup 'sport = :3619'", on macOS "lsof -nP -i :3619", and on Windows "netstat -ano | findstr :3619" to see the local process. From another machine, "nmap -p 3619 <host>" shows whether it is reachable.

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