Arma 3 Headless Client Steam Authentication Failed Hot Extra Quality Guide

: If using BattlEye, ensure your HC profile has accepted the license. You can force this by adding to your HC startup parameters. How to Fix Steam Authentication Failed Error!

This is a more advanced issue but a known cause of connection failures. When a Headless Client starts, it automatically picks a port for its own BattlEye communication, which is always the game port plus 14. For example, if your server runs on default port 2302 , your first HC will try to use port 2316 . The problem arises if you run multiple servers or if another service is already using that port. arma 3 headless client steam authentication failed hot

headlessClients[] = "192.168.1.100";

By adding your HC to the headlessClients[] array, you are explicitly telling the server to trust this source and bypass the standard Steam authentication check for that specific IP address. This directly addresses the server's security mechanism that rejects arbitrary connections. : If using BattlEye, ensure your HC profile

Add the IP address of your Headless Client to server.cfg . This is a more advanced issue but a

: Add arma3server.exe and your Steam folder to Windows Defender/Antivirus exclusions. Steam Account Issues

: Ensure the IP address of the HC is listed in the headlessClients[] and localClient[] arrays within your server.cfg .