Firewalls and Defence in Depth: Why One Wall Is Never Enough
Series: Networking Foundations | Post 12 of 14
We have spent eleven posts finding the same uncomfortable truth in every corner of the internet: almost everything was built to trust too much. Now we turn, for the first time, to the defences. The firewall is where most people's mental picture of security lives: a strong wall around the network, keeping the bad out and trusting everything within. That picture is worth understanding in detail, because it is also, precisely, the one that fails, and understanding why it fails is the whole point of this post.
