Articles I've written

Check TLS certificate revocation with SSL Labs, crt.sh and OpenSSL
March 7, 2020 (updated July 27, 2024)

Browsers mostly don't check whether a HTTPS certificate has been revoked so maybe you'd like to do it manually. There are a few ways how to query an Online Certificate Status Protocol (OCSP) server so let's see some of them. You'll need a browser (and the openssl tool).

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