reply to bakoma
Re: Remote Desktop to home on Comcast It's not blocked; I've been able to use remote desktop into my machines with no problems. I've used it do connect to Win XP Pro, W2i3 Server and Win7 Pro systems at home.
It's just a matter of correctly configuring your own router/firewall to port forward correctly. On my ZyWALL I have to both forward the ports and create a firewall rule to allow the traffic. If you want to be able to connect to more than one machine then you'll have to map a different external port for each machine.
What I do is allow external (password protected) access to the web configuration of the firewall. If I'm somewhere where I need RDP access into my LAN, I'll log in and grant that IP address permission. The RDP access itself is also password protected, as all machines require a user login for access. I'll later remove the firewall rule when it's no longer needed.