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 4096m to run properly.
Ports required to run the server in a table format.
| Port | default |
|---|---|
| Game | 7777 |
| Steam Query | 27015 |