Read this. http://www.akadia.com/services/dyndns_update.html

Then get a free Dynamic DNS account at www.dyndns.com.
The download a client listed here. http://www.dyndns.com/support/clients/
Setup your router.
Enjoy the remote access.

I use this setup to run voice comm software so when I game with friends, we can trash talk!

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-'13 E93 M3 Cab, Interlagos Blue, Carbon Black leather, DCT, all options, and fun, endless fun!
-'13 X5 35i M-Sport, Carbon Black & Cinnamon, Dinan Stage 2!
-'15 Toyota Sienna Limited Premium AWD, Silver & Grey, Nav & BluRay, and less lame than the 2011 it replaced
-'07 Mini Cab S, Laser Blue, 6sp, endless fun that ended (sold)
-'04 X5 4.4i, loaded, loved, modded and sold