SSL
2 posts tagged with SSL.
DNS vs SSL vs HTTP errors: what actually broke?
A broken page can fail at any of four layers — DNS, TCP, TLS, or HTTP. The error message you see almost never names the layer, but the layer is the entire answer. Here's how to tell them apart in under a minute.
May 13, 2026·14 min
Reading SSL certificate errors: the four most common ones, decoded
ERR_CERT_AUTHORITY_INVALID. NET::ERR_CERT_DATE_INVALID. ERR_CERT_COMMON_NAME_INVALID. ERR_SSL_VERSION_OR_CIPHER_MISMATCH. The browser tells you almost exactly what's wrong if you know how to read it. Here is what each one means, why it happens, and what to do.
May 11, 2026·13 min