Multiple & SubDomain's cookie in asp.net Core Identity

Question

I have a webpage which uses multiple URLS for the same application:

for example: *.MyWebPage.com.au *.YourWebPage.com.au

So it will use subdomains on

Answer 1

How many main domains are there? If there are not too many, you can add several CookieAuthenticationOptions. Like this:

        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationScheme = "mywebpage.com.au",
            CookieDomain = "mywebpage.com.au",
        });
        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationScheme = "yourwebpage.com.au",
            CookieDomain = "yourwebpage.com.au",
        });

If there are too many main domains, you will need to write your own cookie provider.