Making a box seem unfirewalled.

[WinSE]

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What is the best way to block a packet and make it seem like the port is
closed.  What is the best way to make the box look like it doesnt exist?

I am more interested in the first, but please respond if you know either, as
when I move out and relocate my servers, I would prefer to have my family's
internet connection look unused.


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