SSL with forms based authentication, explicit proxy, and cannot connect to the virtual host
Browser Error: Page cannot be displayed
When running into this issue, users will experience a connection error or see "Page Cannot Be Displayed."
With forms or redirect based authentication, the virtual host must be set to a hostname which resolves to the proxy's IP address. However, when using these types of authentication with SSL (HTTPS) there also must be an HTTPS service created for port 443:
This will allow the proxy to listen for the HTTPS connection that clients make when being redirected to the virtual host.