Network Security Calculators
30 free network security calculators in Cyber Security.
- ACL Rule CalculatorCount the access control entries a router or switch ACL will expand to and check it against the platform's TCAM budget.
- ARP Spoofing Risk CalculatorScore ARP poisoning exposure in a VLAN from host count, dynamic ARP inspection coverage, port security and cache timeout.
- DDoS Capacity CalculatorCompare scrubbing capacity against a modelled attack volume to see whether your DDoS headroom ratio actually holds.
- DDoS Mitigation CalculatorAdd up detection, diversion and ramp time to find your true time to mitigate, and the traffic lost before it engages.
- DMZ Capacity CalculatorPlan a DMZ: server count, addresses needed against the subnet size, VIP density per public IP and firewall rule load.
- DNS Security CalculatorQuantify malicious DNS query volume, how much your RPZ feeds block, resolver headroom and amplification exposure.
- DNSSEC CalculatorCalculate how much RRSIG and DNSKEY records inflate a DNS response, and whether it still fits UDP, EDNS0 or needs TCP.
- East-West Security CalculatorMeasure lateral movement exposure inside a data centre: uninspected east-west traffic, exposed paths and agents still to deploy.
- Firewall Capacity CalculatorDerate a firewall's datasheet throughput by inspection profile and size its session table memory against your peak load.
- Firewall Rule Count CalculatorPredict how many firewall rules a zone-based policy needs, and how fast the rule base grows with each new security zone.
- IDS Capacity CalculatorSize passive IDS sensors from mirrored traffic: packet rate, sensors required and full-packet-capture storage.
- IPS Throughput CalculatorBlend plaintext and TLS-inspected traffic to find the real throughput an IPS delivers, in both bits and packets per second.
- IPSec Overhead CalculatorBreak down ESP tunnel overhead byte by byte, find the encapsulated packet size and the largest inner MTU that fits.
- MAC Spoofing Risk CalculatorAssess MAC spoofing and CAM table flooding exposure from port security coverage, 802.1X adoption and MAC table headroom.
- Micro-Segmentation CalculatorCompare the worst-case n-squared policy count against your observed flows to size a micro-segmentation rollout.
- NAT Session CalculatorWork out NAT and CGNAT port utilisation, the public IP pool size you need, and how close you are to port exhaustion.
- Network Security Score CalculatorRoll segmentation, firewall hygiene, inspection, DDoS, VPN, DNS and monitoring into one weighted network security score.
- Network Segmentation CalculatorDerive the number of network segments a design needs from trust levels, environments, tiers and host-count limits.
- North-South Security CalculatorDerate a perimeter inspection stack stage by stage to find real capacity, added latency and unmonitored public endpoints.
- Packet Inspection Capacity CalculatorSize deep packet inspection in packets per second: per-packet CPU cycle budget, cores required and nanoseconds per packet.
- Port Scan Coverage CalculatorWork out how long a port scan takes at a given probe rate, and how much of the target range a scan window actually covers.
- Proxy Throughput CalculatorTurn user counts into forward-proxy request rate, throughput, upstream bandwidth saved by caching and concurrent connections.
- Reverse Proxy Security CalculatorModel WAF load on a reverse proxy: rule evaluations, CPU cores, TLS handshake utilisation, blocked traffic and false positives.
- Security Group Coverage CalculatorAudit cloud security group hygiene: resource coverage, internet-open ingress rules, unused groups and a hygiene grade.
- SSL Inspection CalculatorSize TLS interception: how much traffic you actually decrypt after bypass, and whether the device's derated capacity covers it.
- SSL VPN Capacity CalculatorSize an SSL VPN gateway for reconnect storms, TLS throughput and session memory, and see which limit binds first.
- Threat Detection Rate CalculatorApply Bayes to detection rates: turn true and false positive rates plus base rate into real alert precision and analyst load.
- VPN Capacity CalculatorSize a VPN concentrator against aggregate encrypted bandwidth, tunnel count limits and the gateway count you need.
- Web Proxy Capacity CalculatorSize a secure web gateway cluster: appliances required with N+1 sparing, users per node and access-log storage.
- Zero Trust Readiness CalculatorScore your zero trust maturity across identity, device, network, application, data, visibility and automation pillars.