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Andrax Pentester operates as an autonomous cybersecurity laboratory under the SentinelReign research umbrella.

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DNS

Published work tagged DNS.

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SSL/TLS Certificates Explained: Chain, SAN & Expiry (2026)

A TLS certificate binds a domain name to a public key. Here is how I read one, trace its chain, fix common errors, and check CSRs and CAA records.

Syed Zada Abrar · 11 min

Article

What SPF, DKIM, and DMARC do, why aligned SPF or DKIM is enough for DMARC, and how to grade your domain with a live checker.

Syed Zada Abrar · 11 min