This article explains DNS fundamentals, the full query flow, record types, Linux client configuration files, compares BIND9, Dnsmasq, CoreDNS and Unbound, and provides step‑by‑step hands‑on setups for each server with concrete commands and configuration examples.
This article walks through the complete process from entering a URL in a browser to rendering a webpage, covering client DNS resolution, TCP three‑way handshake, HTTP request/response flow, DNS hierarchy, key terminology, using dig for troubleshooting, and step‑by‑step guides to build your own DNS server with BIND or dnsmasq.
This article explains the complete journey of a browser request—from entering a URL, through DNS hierarchy, recursive and iterative queries, to TCP handshakes and HTTP exchange—while also providing step‑by‑step guides for building your own DNS server with BIND or dnsmasq and using dig to trace resolutions.
This article details the motivation, design, implementation, testing, and rollout of a refactored Kubernetes DNS solution that replaces the default kube-dns → CoreDNS chain with a node‑local q‑dnsmasq cache and parallel upstream queries to achieve higher availability, faster resolution, and better cache hit rates in large‑scale clusters.
This guide walks through the complete DNS resolution process, explains key terminology, details the hierarchical structure of DNS servers, demonstrates how to use dig for tracing, and provides step‑by‑step instructions for deploying BIND and dnsmasq on Linux systems.
This guide explains how to detect DNS pollution on Ubuntu 12.04, disable the default NetworkManager dnsmasq cache, install and configure dnsmasq to route specific domain queries through OpenDNS on special ports, and verify that legitimate IP addresses are returned.
