Physical network segmentation

One of the biggest challenges that the Blue Team may face when dealing with network segmentation is getting an accurate view of what is currently implemented in the network. This happens because, most of the time, the network will grow according to the demand, and its security features are not revisited as the network expands. For large corporations, this means rethinking the entire network, and possibly rearchitecting the network from the ground up.

The first step to establishing an appropriate physical network segmentation is to understand the logical distribution of resources according to your company's needs. This debunks the myth that one size fits all, which in reality, it doesn't. You must analyze each network case by case, and plan your network segmentation according to the resource demand and logical access. For small-and medium-sized organizations, it might be easier to aggregate resources according to their departments—for example, resources that belong...