Universal Plug and Play and Back to My Mac

I am trying to enable "Back to My Mac" on my desktop computer so that I can reach it when I am traveling with my laptop.  I have a SMCD3G-CCR modem.  The Mac documentation says that I need to have Universal Plug and Play enabled on the modem - however, when I log in to the modem I don't see any tab or setting that accomplishes that.

Thanks in advance for any help...

Dan
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