Standard caching mechanisms such as varnish offer a great deal in terms of performance. It has been built from the ground up to be a dedicated reverse proxy cache so it doesn't have legacy functionality and code, making it fast & highly responsive.
Because we are an IT security company, we wanted to estimate the impact of EternalBlue on one of our Windows machines where we removed the Microsoft patch. We need to know the impact and the defense mechanisms in place when a Windows machine is not patched.
On Friday a new virus Wannacry was launched to infect Windows machines with ransomware and it was very successful until MalwareTech discovered that there was a "kill switch" in the code, so they hijacked the DNS for that domain and stopped the infections spreading.