If you add -server to launch parameters the game will launch in dedicated server mode that looks like a DOS window. There is a thread on dedicated server in this section. I prefer launching it with a shortcut to launcher.exe that has -server added to command line not through changing Steam launch options. In this way you can launch client at the same time and join your own dedi(cated) server.
"C:\Program Files (x86)\Steam\steamapps\common\il-2 sturmovik cliffs of dover\Launcher.exe" -server
virado para a lua, postaram hoje no Banana's: