I downloaded the latest version of the server, the protocol 45 but it does not show up in a search engine steam.
But other server protocol 17 are shown in a search engine steam.
IP 91.211.118.17:27012 /protocol 45/ Offline Steam - Server running on Windows Server 2012
IP 176.57.142.109:27065 /protocol 17/ Online Steam - Server running on Windows 7
I found out the reason for the differences protocol if the computer is not running when you start Steam - Brink change the protocol server at 45, when running the Steam - true test protocol 17