troubleshooting Question

Connecting to web server computer from "inside"

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hypercubeFlag for United States of America asked on
RoutersNetworking ProtocolsSSL / HTTPS
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I was asked to complete the firewall rules on a Windows 8 computer used as a web server on a private network with port forwarding in the gateway router.

The address is an https:// address and port 443 is what's being used.

If one has the URL, is it possible to browse to the URL from inside the private LAN?  I'd never thought about this before.  
If not then what is best practice for getting access from inside the LAN?

The topology is:
Public address facing the internet (what What is My IP reports).
Public address block for which the LAN NATs into.
(I don't understand how this works and why What is My IP reports one when it's really another - but perhaps no matter).
Router forwards the public IP:port 443 to the server:port 443.
Private LAN address of the server.
Server firewall with port 443 open.

Should one be able to access the server using the public URL?
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