https://sudonull.com/x-509-certificates-asn-1-and-generation
Breakdown of X.509 structure, DV/OV/EV types, trust chains. openssl, keytool, certbot commands for middle/senior dev. Create your own PKI — instructions inside.
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https://sudonull.com/openssh-10-3-security-patches-and-new-features
Learn about vulnerability fixes in ssh/sshd, support for IANA agents and new options in OpenSSH 10.3. Patches for ECDSA, scp and configuration. Update systems for protection.
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