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Articles tagged with #dns
Introduction Understanding DNS behavior in production systems requires more than just running dig. When you need to observe exactly which nameservers are being contacted, what packets are flying acros
DNS Operations: Negative Caching, Domain Transfers, Zone Transfers, and WHOIS Introduction DNS is not just about translating domain names to IP addresses. It's also about managing the lifecycle of dom
Introduction DNS is often thought of as simply translating domain names to IP addresses (A records). In reality, DNS supports 25+ different record types, each serving specific purposes in the modern i
DoH, DoT, and DNSSEC Introduction Traditional DNS has a serious problem: every query you send is unencrypted and visible to anyone on the network path between you and the resolver. Your ISP, network a
EDNS Introduction {#introduction} DNS was designed in the 1980s when hardware was slow, networks were limited, and the internet was tiny. The original protocol made sense then. But we're not in the 19
DNS Requests and Responses Introduction A DNS query seems simple from the user's perspective: User: "What's the IP for example.com?" DNS: "192.0.2.1" But behind the scenes, structured messages are be