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The background, in plain English.
Reference guides to the things we check and clients ask about. No prior knowledge assumed, and no sales pitch in the middle of an explanation. For structured courses, try CyberLearn.
DNS records explained
What each DNS record type does, in plain English: A, AAAA, CNAME, MX, TXT, NS and the rest, and which ones matter for security.
Read the guide →DNS threats and how they work
DNS hijacking, cache poisoning, subdomain takeover and the rest: how each attack works, and what actually detects it.
Read the guide →Email security: SPF, DKIM and DMARC
How the three email authentication records work together, why p=none leaves you spoofable, and how to move to enforcement safely.
Read the guide →Domains that do not send mail
A parked or non-sending domain still needs locking down. Why SPF -all and DMARC reject matter even when you never send email.
Read the guide →