Windows 7 has the ability to allow you to access your Media Library from a remote machine over the internet. To do this, you need to configure media sharing on both the machine to share the media and the machine to access the media.
• 2 computers connected to your home network and joined to your homegroup. (A desktop and laptop work great.)
• A Windows 7 Online ID Provider. At this time, only Windows Live is supported.
• A UPnP capable router or the ability to statically forward ports to your computer.
• For testing, you will need a computer not connected to your home network, but a member of your homegroup.
• Open Windows Media Player.
• Open Your Library (Press, the ALT key, choose View - Library).
• Click the down arrow beside the word Stream and choose Allow Internet access to my home media...
• Choose Allow Internet access to my home media again and follow the instructions for linking your Live ID to your media library using the Windows Live ID Sign-In Assistant.
• While connected to your home network, verify the remote computer is a member of your homegroup.
• Verify that you can see your home machine under Other Libraries and are able to access and play music.
• Follow the instructions above to link your remote computer to the same Live ID as your home computer.
• Connect your computer to a network other than your home network.
• Right-Click on Other Libraries and choose Refresh Other Libraries.
• If you have successfully configured things, you should see your home computer.
• Note the world icon that I have highlighted on the left. That means you are connected over the internet.
• To verify, right click on a song and choose properties, it should start with dlna-playsingle://.
• I had trouble with my Linksys WRT610N and the SPI firewall. With it enabled, media sharing would not work and I could never get my home machine to display in my remote media player. As soon as I disabled SPI Firewall, my home machine became immediately accessible.
• If you would prefer to forward ports manually rather than enable UPnP, follow this guide.