The perimeter is a lie (part 1)

The perimeter is a lie

I recall in early 2000’s having a debate with a security expert about firewalls, at the time they were advocating the firewall model was fundamentally broken! Their argument was if any traffic could get through, in any direction, for any purpose, bad guys could figure out how to use it to exploit the system. I disagreed, believing the ‘new’ filtering technology would be able to stop them, I was wrong.