Windows 2012 R2 IIS 8.5
I'm wondering if there is a way IIS to redirect to the correct port if say they type in www.microsoft.com it will go to say www.microsoft.com:8383? Not real familiar with IIS.
Here's a link to a Microsoft article on configuring redirects: https://support.microsoft.com/en-us/kb/324000
It's referring to IIS 7.0, but the basics haven't changed.