Your company usually doles out 10 dot numbers on their domain when you connect through VPN to the companies resources. The new Comcast routers are set to dole out 10 dot numbers as well. So when you are communicating on your VPN trying to reach a server at a 10 dot location in your company, that traffice may be going to your IP printer sitting next to you with a 10 dog number...not through the VPN to the server. THis is why changing the IP address of the Comcast router and subsequent DHCP server on that router is your biggest solution to this problem...192.168.1.1 for the router/gateway and .100-150 for the DHCP range. Disabling peer-to-peer blocking may also help, I'm not sure about that.
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