Personal Web Sharing problem



I want to use the Personal Web Sharing facility to allow people on the internet to view some of my files but my iMac is connected via a Netgear Router.

This means that the iMac has a local IP address which comes up in the Websharing control panel but the router has the "real" IP address (which is a permanent one) from my ISP.

How do I specify a link to my iMac for others to use? The local IP gives them a connection failure and the real IP connects to the router and asks for an admin password (which I don't to give to anyone for obvious reasons).

Any help would be greatly appreciated.



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