hi I have configured rds gateway on windows 2012 , one server having all rds role ( connection broker, webapp,rdgateway & remote desktop session host ) as per this kb :https://www.lemonbits.com/2014/06/20/installing-standalone-remote-desktop-gateway-on-the-windows-server-2012-r2-without-complete-remote-desktop-services-infrastructure/
after that now i am getting remote desktop services temporary unavailable .
Reviewed all setting :removed port 80
Internally using RDWeb works ok.
I have added the certificate in Gateway Manager