I was only using the 10.x.x.x network as an example on what to provide. Can you provide your subnetwork address? Your trace goes to the last hop before the gnuite server. That is why I think there is some filtering on the server preventing responses back to you. Can you ping 64.72.119,252? That server is on the same subnet as gnuite's and would help determine if you are being blocked from an individual ip or a whole sub-net.