Hi Kotena,
If you have configured your URL to be a public URL that can be accessed over the internet, you would be able to access CRM using the
https://servername.domainname:port
At times, the internal url that is configured for CRM is not publicly available. To make it available you either setup your CRM on a public ip like you have done or configure IFD for claims based authentication.
When you use the public IP option, you are still working on Windows authentication and it would show up the windows prompt to enter credentials.
IFD presents the user with the Sign-in page and the user can type in their credentials to access CRM.
HTH
Sam
Web: http://www.inogic.com
Blog: http://inogic.blogspot.com
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