Beyond ports and addresses — application control, intrusion prevention, and inspecting encrypted traffic. What each feature genuinely buys you, and what it costs in throughput.
Network Security
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What a Next-Generation Firewall Actually Does -
Firewall Troubleshooting An application that stopped working after inspection was enabled, VPN tunnels that drop, slow internet that appeared overnight, and rules that do not do what you expected.
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Sizing a Firewall for Your Network Which throughput number to size against, why VPN and inspection change the answer, and how to avoid buying a firewall that becomes the bottleneck the day you enable security features.
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Firewall Deployment and Policy Basics Getting a firewall in place without locking yourself out, writing policy that is specific rather than permissive, and the cutover order that lets you back out if something breaks.
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