I uploaded everything using WinSCP and set permissions for the two data folders as instructed by the guide.
My server passed the preliminary tests.
The sql database setup went fine and I got a message that the config.php file had been successfully written to the library folder.
But on the next step I got a "lost connection to server" error.
I deleted the whole community folder and started over from scratch. Same thing.
Any idea what I'm doing wrong? The installation errors out somewhere around step 2b.