Internal Segmentation Firewalls—Securing the Inner Network | Fortinet Blog

Our threat landscape is constantly evolving. As known vectors are exposed and neutralized, new methods emerge to take their places. And the current wave of advanced threats are getting increasingly better at slipping past perimeter security to reach the unprotected internal network. While edge firewalls do an excellent job of protecting the network border, they can’t help after a breach occurs.

It might be malicious code that sits dormant for months before launching an opportunistic attack on critical infrastructure. Or it could be a hack that quietly exfiltrates sensitive data and intellectual property. Once something reaches the network interior, there’s traditionally been very little in place to spot their presence or activities—let alone stop them. This is why some of the recent breaches you may have heard of went undetected over extended periods of time, with damages snowballing into the millions of dollars.

Internal Segmentation Firewalls—Securing the Inner Network | Fortinet Blog