From their Site
Experience true combat gameplay in a massive military sandbox. Deploying a wide variety of single- and multiplayer content, over 20 vehicles and 40 weapons, and limitless opportunities for content creation, this is the PC’s premier military game. Authentic, diverse, open - Arma 3 sends you to war.
This server requires about 2048m to run properly. ARMA 3 is more CPU intensive though.
Additional server flags can be found here.
This can help is you see the server using to many cores/threads on the server.
Ports required to run the server in a table format.
| Port | default |
|---|---|
| Game | 2302-2306 |
| BattleEye | 2344-2345 |