Roll segmentation, firewall hygiene, inspection, DDoS, VPN, DNS and monitoring into one weighted network security score.
Segmentation and monitoring carry the heaviest weight because they respectively bound and reveal every incident — one limits how far an attacker gets, the other determines whether you find out. The highest-leverage domain is not simply the weakest one: it is where weight multiplied by the remaining gap is largest, which is where the next point of investment buys the most score. A single composite number is what gets a network security programme funded, but only the leverage breakdown tells you which control to buy next.
Network Security Score
score = 0.20·segmentation + 0.20·monitoring + 0.15·firewall hygiene + 0.15·inspection + 0.10·DDoS + 0.10·VPN + 0.10·DNS.
score = 0.20·segmentation + 0.20·monitoring + 0.15·firewall hygiene + 0.15·inspection + 0.10·DDoS + 0.10·VPN + 0.10·DNS. Segmentation and monitoring carry the heaviest weight because they respectively bound and reveal every incident — one limits how far an attacker gets, the other determines whether you find out. The highest-leverage domain is not simply the weakest one: it is where weight multiplied by the remaining gap is largest, which is where the next point of investment buys the most score.
A single composite number is what gets a network security programme funded, but only the leverage breakdown tells you which control to buy next.
This calculator takes 8 inputs: Segmentation and micro-segmentation coverage, Firewall rule hygiene (no any-any, reviewed rules), Traffic under IPS and TLS inspection, DDoS mitigation readiness, VPN and remote access posture, DNS security controls in place, Network telemetry and monitoring coverage, Target score. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.
Weakest is the lowest raw percentage; highest-leverage is weight × gap. A DNS security domain at 40% contributes 0.10 × 60 = 6 points of loss, while monitoring at 60% contributes 0.20 × 40 = 8. Fixing monitoring moves the score more even though DNS looks worse, which is exactly the sort of prioritisation a flat scorecard hides.