How coincidental that we just learned tunneling in my Unix networking course last night. In any case, I think this can be done a simpler way as well. I remember a few years back a friend and I were both on the same cable modem connection, and we were able to set up a WAN between our two houses to be in the same Windows workgroup. I don't at all remember how it was done - but unfortunately I think it required that we both be on the same cable modem provider.
cscgal
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