The Shift to Internal Firewalls: Why Zero Trust Segmentation Is Replacing Perimeter-Only Security
By
HackMoN Ai
Summary
The article argues that traditional perimeter-based firewalls are no longer sufficient for modern cybersecurity, as threats increasingly originate from inside the network through compromised devices like IoT cameras, vendor laptops, and employee workstations. It advocates for a "deny-by-default" internal firewall strategy as part of a Zero Trust architecture, creating micro-perimeters around critical assets to prevent lateral movement by attackers who have already breached the edge. The piece features insights from Charles Crampton, CEO of Akzium, on why organizations must complement edge defenses with internal network segmentation.
Source
bskyThe Shift to Internal Firewalls: Why Zero Trust Segmentation Is Replacing Perimeter-Only Securityundercodetesting.comKey quotes
· 3 pulledThe real danger now lurks inside the network—compromised IoT cameras, vendor laptops, or employee workstations can move laterally to cripple backups, domain controllers, and storage systems.
This shift demands a 'deny-by-default' internal firewall strategy that complements edge defenses, creating micro-perimeters around critical assets rather than relying on a single perimeter.
Most organizations still pour their security budgets into perimeter firewalls, assuming that blocking threats at the internet edge is enough.
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