Firewalls Modern Thinking - Steven Bellovin Technion Computer Engineering lecture

Firewalls: Modern Thinking - Steven Bellovin of Columbia University at Technion Computer Engineering center summer school 2014

Firewalls have been a mainstay of Internet defense for more than 20 years. It's quite clear, though, that they're not nearly as useful as they once were. Are they good for anything? How can we make them useful? What should we do differently?