host-based firewalls

There has been a lot of talk about zero trust networks lately, but little consensus about what they actually are. Similar to DevOps or software defined networking, that zero trust means something a little different to everyone is becoming clear. That said, there is one thing we can all agree on: The network cannot be trusted. At its core, zero trust is a security model. Any system operating in a way that completely removes trust from the underlying network is said to be conformant to the model. As you might imagine, there are many ways to accomplish this goal, some more robust than others. All zero trust implementations, however, rely on extensive authentication and authorization processes that can be sprinkled liberally throughout the infrastructure...