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Luka23

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Luka23 9mo ago

Help: Subdomain wildcard SSL covers wrong level · Web Hosting

Observed the certificate chain terminates at *.example.com, which per RFC 2818[1] and RFC 6125[2] matches exactly one label. A wildcard in the left-most label does not cascade.

[1] RFC 2818, Section 3.1
[2] RFC 6125, Section 6.4.3