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Quick checks

Internet Speed TestConnection QualityGeographic LocationIPv4 / IPv6 Readiness

Insights & reports

Guided TroubleshootingConnection ComparisonReliability MonitorNetwork Health SummarySupport ReportService HealthWebsite & Path TesterNetwork Change ComparisonShareable Status Report

Technical tools

Ping TestPort TestNetwork AnalyzerMAC Vendor FinderSSL Certificate CheckerRDAP Domain & IP LookupWireless Password GeneratorEvidence Report Verifier

Email & DNS

Toolkit overviewSPF evaluatorDKIM validatorHeader analyserDMARC report readerEmail domain healthDNSSEC & DANEConfiguration preflightDiagnostic case workspaceDNS, TLS & policy monitorGenerators & bulk DNSDNS lookupAuthoritative DNS trace

Plan a network

Subnet CalculatorFibre Cable GuideSwitch/Firewall Cheat SheetFirewall Migration Planner

Help & Privacy

Tool GuidesHelp, accuracy & privacySaved Data & PrivacyRights & LicensingRelease NotesAdministrator sign-in
Read the SSL Certificate Checker guide
!SSL and HTTP Security Checker limitationsHTTPS and header checks originate from the hosted service and are observations, not a complete security audit.Expand disclaimerCollapse disclaimer⌄

Certificate details may depend on an external cached assessment. Redirects, load balancers, geographic routing and changing responses can affect what is observed. Missing or present headers alone do not prove that a website is insecure or secure; appropriate policies depend on the application.

Important: Do not rely on this result alone for purchasing, configuration, security, safety, compliance, contractual or fault-diagnosis decisions. Results can be incomplete, delayed, misleading or wrong. Verify important findings with the relevant provider, manufacturer documentation and an appropriate independent test or qualified professional.

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