We Thought the Firewall Handled That
This month brought the most dangerous assumption of all.
“We have a firewall.”
That sentence ended more conversations than it should have.
Firewalls were doing important work. They blocked obvious traffic. They filtered noise. They made businesses feel protected.
They also gave a false sense of completeness.
By September, threats weren’t just knocking on the front door. They were arriving through email. Through laptops that left the building and came back. Through trusted connections that never felt risky.
When something slipped through, the reaction was confusion.
“How did this get past the firewall?”
The firewall wasn’t the problem. The assumption was.
Firewalls controlled paths. They didn’t control behavior. They couldn’t fix weak passwords. They couldn’t stop someone from opening the wrong attachment. They couldn’t help if a laptop was already compromised before it reconnected.
September was when perimeter thinking started to show its limits.
Not everything dangerous looked like an attack. Some of it looked like normal business coming back inside.
Once that reality set in, conversations changed.
Security stopped being something you installed at the edge. It became something you practiced everywhere.
And that was a harder lesson—but a necessary one.