How to set up a Call of Duty: Modern Warfare 3 Dedicated Server - Tutorial

This tutorial describes how to properly set up a Call of Duty: Modern Warfare 3 Dedicated Server. I&had a lot of problems with setting it up, so I want to share this to everyone so they don&have to spent so much time for it. --------- Server.cfg - first lines --------- // Specify server configuration file (this file) +set sv_config "server.cfg" (default "server.cfg") // Specify server visibility (1 = LAN, 2 = Internet (default) ) +set dedicated 2 // Open game port (Steam-visible server game port) +set net_queryPort 27014 // Secure game port +set net_port 27015 // Steam authentication port +set net_authPort 8766 // Steam master server (server browser) port +set net_masterServerPort 27016 ------- My target: ------- "C:Program Files (x86)Steamsteamappscommoncall of duty modern warfare 3iw5mp_server.exe" +start_map_rotate +set sv_maprotation default