When I try to enter my.domain.com
I get
403 - Forbidden: Access is denied.
But when I enter my.domain.com/Login.aspx
it works fine.
Where do I redirect the main url to the login page, in web.config or in IIS? Or is there a better solution to this?
Try to add your Login.aspx to your default document of IIS.
Below are the steps to do so
Step - 1
Select your wesbite IIS
Step - 2
Add "Login.aspx"
here