DechoNet

ClaudeCommunityby DechoNet

DechoNet checks domains, links and IP addresses from the outside, using only public information, and explains what it finds in plain language. What you can ask Claude to do with it: - Give a domain an overall security score (0–100, grade A+ to F) with the fixes that matter most, across DNS, the TLS certificate, HTTP security headers, email authentication, open common ports, registration data and network. - Check whether a link from a text message or email shows phishing signals. Redirects and URL shorteners are followed to the real destination, which is compared with the brand it imitates; new, look-alike and punycode domains, app downloads and fake "verify you are human" pages are flagged. - Run single checks: DNS records and propagation, the certificate and TLS versions, SPF/DKIM/DMARC, response headers, registration (RDAP), reverse DNS and ASN, subdomains seen in certificate logs, look-alike domains, post-quantum TLS readiness, and a pre-launch checklist. - See what changed on a domain since DechoNet last looked at it, and register a domain for daily re-checks when you ask to monitor it. Who it is for: site owners, developers, IT and security staff, and anyone who received a suspicious link. How it works: checks run from DechoNet's observation points — Cloudflare's global edge plus a vantage point in Seoul, which sees sites the way visitors in Korea do. Every result gives a status, key measurements, findings with severity, recommended fixes, when it was measured, and a link to the full report on dechonet.com. Limits: DechoNet reads public data only. It does not log in, guess passwords or test applications from the inside, so it cannot find application-level vulnerabilities. A result without warning signs is not a guarantee that a site or link is safe; it is a snapshot at the time shown. 24 tools are read-only; one (watch_domain) only registers a domain for daily re-checks.