Do you still need a firewall?

Six years ago I wrote, “Firewalls need to go away. I’m just saying what we all already know. Firewalls have always been problematic, and today there is almost no reason to have one.” Firewalls were—and still are—no longer effective against modern attacks.

Recently, someone asked me at security conference if I still believed firewalls were not needed. The answer is emphatically “Yes!” The evidence over the last six years has only strengthened my resolve, but that applies only to traditional firewalls. Let me explain.

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