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// Other services

Port 3643: AudioJuggler

Port 3643 is assigned by IANA to audiojuggler (AudioJuggler).

3643

How audiojuggler works

Other services
client:3643audiojugglerresponse client:3643audiojugglerresponse

The client sends a request to port 3643 and the audiojuggler 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 3643 dangerous?

We have no specific security note for port 3643. 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 3643

ServicePortTransportDescriptionReferenceUpdated
audiojuggler 3643 TCP, UDP AudioJuggler - 2002-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 3643, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3643'      # process listening on 3643
sudo lsof -nP -i :3643

macOS

sudo lsof -nP -i :3643

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3643 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3643
netstat -ano | findstr :3643

From another machine

nmap -p 3643 -sV <host>
sudo nmap -sU -p 3643 <host>
nc -zv <host> 3643

Block it in the firewall

sudo ufw deny 3643/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3643" -Direction Inbound -LocalPort 3643 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3643 used for?

Port 3643 is assigned by IANA to audiojuggler (AudioJuggler).

Is port 3643 TCP or UDP?

Port 3643 is registered for TCP and UDP.

Is it safe to open port 3643?

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 3643 is open?

On Linux run "ss -ltnup 'sport = :3643'", on macOS "lsof -nP -i :3643", and on Windows "netstat -ano | findstr :3643" to see the local process. From another machine, "nmap -p 3643 <host>" shows whether it is reachable.

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