CyberHunter
Local dataset, no network
// Gaming

Port 4534: Armagetron Advanced Game Server

Port 4534 is assigned by IANA to armagetronad (Armagetron Advanced Game Server).

4534

How armagetronad works

Gaming
playergame serverposition, input, state × 60 / s playerserver60 updates / s

The game client and server exchange small updates many times per second over port 4534.

Transport
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
Gaming
01 Security

Is port 4534 dangerous?

We have no specific security note for port 4534. Its risk depends on the program actually listening on it. General advice for gaming services:

  • Keep game servers and their plugins updated.
  • Rate-limit queries to limit DDoS amplification.
  • Run game servers under an unprivileged account.
02 Registry

IANA registry entries for port 4534

ServicePortTransportDescriptionReferenceUpdated
armagetronad 4534 UDP Armagetron Advanced Game Server - 2012-11-02
-4534-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4534, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4534'      # process listening on 4534
sudo lsof -nP -i :4534

macOS

sudo lsof -nP -i :4534

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4534 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4534
netstat -ano | findstr :4534

From another machine

nmap -p 4534 -sV <host>
sudo nmap -sU -p 4534 <host>
nc -zv <host> 4534

Block it in the firewall

sudo ufw deny 4534/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4534" -Direction Inbound -LocalPort 4534 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 4534 used for?

Port 4534 is assigned by IANA to armagetronad (Armagetron Advanced Game Server).

Is port 4534 TCP or UDP?

Port 4534 is registered for UDP.

Is it safe to open port 4534?

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. Keep game servers and their plugins updated.

How do I check if port 4534 is open?

On Linux run "ss -ltnup 'sport = :4534'", on macOS "lsof -nP -i :4534", and on Windows "netstat -ano | findstr :4534" to see the local process. From another machine, "nmap -p 4534 <host>" shows whether it is reachable.

05 Related
:25565 Minecraft tcp · moderate risk :27015 Steam / Source engine udp · tcp · moderate risk :666 doom Id Software tcp · udp :1926 Evolution Game Server tcp · udp :2346 Game Connection Port tcp · udp :2347 Game Announcement and Location tcp · udp :2348 Information to query for game status tcp · udp :2914 Game Lobby tcp · udp

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