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// Other services

Port 1834: ARDUS Unicast

Port 1834 is assigned by IANA to ardusuni (ARDUS Unicast).

1834

How ardusuni works

Other services
client:1834ardusuniresponse client:1834ardusuniresponse

The client sends a request to port 1834 and the ardusuni 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 1834 dangerous?

We have no specific security note for port 1834. 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 1834

ServicePortTransportDescriptionReferenceUpdated
ardusuni 1834 TCP, UDP ARDUS Unicast - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1834, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1834'      # process listening on 1834
sudo lsof -nP -i :1834

macOS

sudo lsof -nP -i :1834

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1834 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1834
netstat -ano | findstr :1834

From another machine

nmap -p 1834 -sV <host>
sudo nmap -sU -p 1834 <host>
nc -zv <host> 1834

Block it in the firewall

sudo ufw deny 1834/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1834" -Direction Inbound -LocalPort 1834 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1834 used for?

Port 1834 is assigned by IANA to ardusuni (ARDUS Unicast).

Is port 1834 TCP or UDP?

Port 1834 is registered for TCP and UDP.

Is it safe to open port 1834?

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 1834 is open?

On Linux run "ss -ltnup 'sport = :1834'", on macOS "lsof -nP -i :1834", and on Windows "netstat -ano | findstr :1834" to see the local process. From another machine, "nmap -p 1834 <host>" shows whether it is reachable.

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