Arma 3 Headless Client Steam Authentication Failed Hot |best| ★ Trusted & Tested

If your server doesn't explicitly allow the IP address of your Headless Client, the Steam authentication will often fail or time out. You must verify these settings in your server.cfg :

arma3server.exe -client -connect=127.0.0.1 -port=2302 -password=ServerPass -mod=@modlist Quotes for Mods : If your mod list contains spaces, wrap the entire arma 3 headless client steam authentication failed hot

The Headless Client must load as the dedicated server, in the same order . Not "most of them." All of them. If your server doesn't explicitly allow the IP

Inspect launch parameters

If your main server runs BattleEye (it should), the HC must authenticate through it. Add this: arma 3 headless client steam authentication failed hot