User475983607 posted
I currently have a web site built with web forms that uses Forms Authentication (website 1). I'm looking to create a .NET 5 web application that will reside on the same server (website
2). Users will only use website 1 to sign in. What is the best way to automatically sign them into website 2 when they sign into website 1?
.NET 5 does not use Forms Authentication. You'll need to come up with a different approach. Typically SSO uses OAuth/OIDC these days.
Also, say website 1 has the url example.com. Can website 2 use the same url and just use a different port, or should I set up a subdomain name app.example.com?
The flow is more complex than you realize. At least learn how the OAuth/OIDC flows works. That should help you understand the problem you are trying to solve.
