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Parallel Processing: Headless Clients

Arma 3 is heavily bound by single-core CPU performance. A Headless Client (HC) is essentially a transparent player that connects to the server and takes ownership of AI units. This moves the heavy calculations of AI pathfinding to a separate CPU core, freeing up the main server thread for networking and physics.
Reading TimeDifficultyLast Updated
5 minutesAdvancedJanuary 2026

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Configuration

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1. Authorization

You must tell the server to accept a connection from a local HC.
  • File: server.cfg
  • Add: headlessClients[]={"127.0.0.1"};
  • Add: localClient[]={"127.0.0.1"};

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2. Panel Activation

  • Navigate to the Headless Client tab in your FREAKHOSTING panel.
  • click Enable Headless Client.
  • The panel will now spawn a secondary process alongside your main server whenever you click Start.

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Mission Support

Critical: Simply turning on an HC does nothing. Your mission file must be coded to recognize and use it.
  • Antistasi / Liberation: These popular scenarios have built-in HC auto-detection.
  • Custom Missions: You must trigger a script (like Werthles Headless Kit) or use the Eden Editor “Headless Client” module to manually transfer units from the Server to the HC.

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Support Channels

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Last Updated: January 2026 | Arma 3: Load balanced.