Note: This works for local networks best. For WAN, you also need -beclientguid .
Network issues blocking Steam services
In server logs, a "Hot" error usually indicates an immediate disconnection or a critical security failure. You cannot ignore this; the HC will never process AI if this error persists. arma 3 headless client steam authentication failed hot
This is the long feature guide to understanding, diagnosing, and slaying the "Steam Authentication Failed" error for the Arma 3 Headless Client. Note: This works for local networks best