Certificate Chain

A certificate chain is the sequence of certificates linking your site's SSL certificate to a trusted root certificate authority.

If an intermediate certificate is missing from the chain, some browsers and clients reject the connection even though the certificate itself is valid, a subtle, common misconfiguration that monitoring catches.

Keep your certificate chain under watch

Uptimeify checks chain, issuer and remaining lifetime on every run and flags a missing intermediate before the first browser throws a warning.

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Related terms

SSL/TLS CertificateAn SSL/TLS certificate is a digital credential that enables encrypted HTTPS connections and proves a site owns its domain.TLS HandshakeThe TLS handshake is the negotiation at the start of an HTTPS connection where client and server agree on encryption and the server proves its identity with a certificate.SSL ExpirySSL expiry is the date an SSL/TLS certificate stops being valid, after which browsers reject the connection.

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