First a little background. My company is renting some servers at the Terremark cloud. As we want to connect our servers to the infrastructure of a mobile carrier in order to restrict our end users to only be able to access our service, the carrier proposed to use the "GRE over Internet" solution, and we are almost set, but one thing. For some reason the carrier wants to know the router make and model, because it's important for some configuration on their end. We asked the Terremark support of course, but apparently it requires some sort of managerial authorization to let us know the information that we need. And this authorization just doesn't want to come out!
So, here's the real question. First off, is it possible for us to figure out somehow what is the make/model of the router where our public IP is assigned? Secondly, because it's in the cloud, I assume the physical router might change at any time without our knowledge; how much can it affect the GRE over Internet solution?