SharkDNS guide
6 min readDNS health check guide
What a domain DNS audit covers: delegation, nameservers, SOA, mail records, DNSSEC, and security policies.
DNS health checkdomain auditdelegation checkDNSSEC auditDNS健康检查
When to use it
Audit a domain after changing DNS providers, when email stops flowing, when a site is unreachable in some regions, or as a periodic best-practice review.
What the audit checks
The audit verifies that NS records exist and match between parent and zone, that nameserver hostnames resolve and span multiple networks, that SOA timers are sane, that MX hosts resolve, and that SPF, DMARC, CAA, DNSSEC, and HTTPS records are in place.
Reading the score
Each check carries a weight. Passed checks add full credit, warnings add half, and failures add none. A score above 85 with no failures is healthy; anything lower points at specific findings to fix first.
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