Wildcard Certificates: What They Cover and Where They Fail

A wildcard certificate is often sold, and understood, as "one certificate to cover every subdomain," which is close enough to true to be useful but not quite precise enough to avoid real, occasionally confusing gaps in coverage. Understanding exactly what…

SAN (Multi-Domain) vs Wildcard Certificates for Subdomains

Both SAN certificates and wildcard certificates solve the same basic problem — covering multiple hostnames with a single certificate — but they solve it with meaningfully different tradeoffs around flexibility, security exposure, and ongoing maintenance, and choosing between them deserves…