This infographic explains why perimeter defenses alone cannot protect modern networks. Organizations must connect internal systems with cloud platforms, endpoints, gateways, WAN services, and external networks, creating paths that attackers may exploit. Once a threat passes the perimeter, a flat internal network can allow unrestricted movement toward sensitive applications and data. The recommended approach is to divide the environment into trust zones and place internal segmentation firewalls between them. This limits lateral movement, applies controls closer to valuable assets, and prevents a single compromise from spreading throughout the organization. FortiGate Internal Segmentation Firewalls provide high-speed segmentation and threat protection while minimizing disruption to internal

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