/tools
Free networking & security tools
Built by Cybersecurity Forefront. Use them anytime — no signup needed.
Subnet Calculator
Compute network, broadcast, usable range, hosts, CIDR & wildcard mask.
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DNS Health Check
Audit SPF, DKIM, DMARC, DNSSEC, MTA-STS, and 4 major blacklists in seconds.
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CVE Lookup for your firewall
Check your Fortinet, WatchGuard, Zyxel, or pfSense firmware against the official NVD database.
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TLS / SSL Inspector
Cert chain, protocol matrix (TLS 1.0-1.3), HSTS, key size — graded A-F.
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Security Headers Analyzer
Grade CSP, HSTS, X-Frame-Options, Permissions-Policy and more out of 100.
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Password Breach Check
Privacy-first k-anonymous lookup against 850M+ leaked password hashes.
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NIS2 Readiness Assessment
15-question audit across NIS2 Article 21 measures, with PDF roadmap.
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Need the full toolkit?
Sign up to access ZeroConf — our multi-vendor firewall provisioning wizard with 37 supported models, live CLI preview, and saved configurations.
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