What is http SYS?

By Tom Dykstra and Chris Ross HTTP.sys is a web server for ASP.NET Core that only runs on Windows. HTTP.sys is an alternative to Kestrel server and offers some features that Kestrel doesn’t provide.

What is httpsys in ASP NET Core?

HTTP.sys web server implementation in ASP.NET Core. HTTP.sys is a web server for ASP.NET Core that only runs on Windows. HTTP.sys is an alternative to Kestrel server and offers some features that Kestrel doesn’t provide. HTTP.sys isn’t compatible with the ASP.NET Core Module and can’t be used with IIS or IIS Express.

Is it possible to disable HTTP/2 with HTTP/SYS?

In a future release of Windows, HTTP/2 configuration flags will be available, including the ability to disable HTTP/2 with HTTP.sys. HTTP.sys delegates to kernel mode authentication with the Kerberos authentication protocol.