from what i gathered in the post, i just need to add the 206.x.x.x/16 space in the windows firewall, right? i just added a Deny rule on my work laptop. Do i also need to do the other 173 range that you posted?
Also, some people were doing this in their router's IP tables, but i'm not so sure i can do that.
Someone linked to a good guide the other day, but I'm not able to find it at this time.
You need to go into your advanced firewall for windows, create a outbound rule, choose custom, all programs, all ports, tcp for protocol, enter address lines as 188.8.131.52/16 etc, and finish.
It should look like below for 184.108.40.206/16 in your advanced firewall if done right.
The 173 subnet class c is for vimeo if I read correctly, I just used google in the above example. And its 206.111 not 206.x
And IpTables wise, routers like the Actiontec supplied by FiOS allows for GUI Web Access for advanced filtering.