Отказоустойчивый Anycast DNS с управлением через IaC
DNS — неотъемлемая и очень важная часть инфраструктуры, о которой иногда забывают. Порой её воспринимают как нечто само собой разумеюще…
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SPF Records Explained: Prevent Email Spoofing with Sender Policy Framework
TL;DR SPF (Sender Policy Framework) is the first line of defense against email spoofing, allowing domain owners to declare which IP addresses and serv…
DKIM Explained: How Email Digital Signatures Protect Your Domain
TL;DR DKIM (DomainKeys Identified Mail) adds a cryptographic signature to every outgoing email, allowing recipients to verify that the message was aut…
DNS Records: The Complete Reference Guide for Every Record Type
TL;DR DNS (Domain Name System) translates human-readable domain names into IP addresses and service endpoints. With over 1.1 trillion DNS queries hand…
DNS Propagation: How Long Does It Really Take? (With Technical Explanation)
TL;DR DNS propagation — the time it takes for DNS changes to reach every resolver worldwide — is one of the most misunderstood concepts in web operati…