[blue68f100]

Your best bet would be to setup a DynDNS on the router. Then set the snap for FTP access. SnapOS is picky when it comes to FTP. So test locally before trying outside connection. Remember to use passive for outside connection through your router. You will need to test to see if Comcast is blocking port 21, there bad about blocking ports. They do not allow servers on residential connections. If so I think your router will support port redirect. Then choose a port between 1024-65535.