Wake sleeping computer from outside of LAN...?

Hello.
I use Timbuktu to remotely access my home computer from work and my work computer from home. I'd like to not have to leave my computer on at home all day, but once it's set to sleep, Timbuktu can't access it. Is it possible (via 3rd party app perhaps?) to wake a computer remotely from outside the LAN? I am able to do this from within the LAN, but this doesn't help when trying to do the same from a machine outside the LAN.
Any suggestions?
Thanks,
Kristin.

You need a router that has the ability to send a "magic" packet to a MAC address that you specify. Most new routers can't do this. The IOGEAR GWA504 wireless router can do this to a computer connected via a LAN cable but not by wireless. Very old SMC routers also had this capability. You login to the router from the WAN side and tell it to send a wake-up packet to a specific MAC address.

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