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Expert guides on domain registration, WHOIS lookup, DNS, SSL, and domain investing.
DNS amplification attacks weaponize misconfigured DNS resolvers to flood targets with massive DDoS traffic. This article breaks down how these attacks work, highlights real-world incidents, and provides actionable steps to prevent your DNS infrastructure from being used as a weapon.
This article explains how DNSSEC uses NSEC and NSEC3 records to authenticate “denial of existence” responses. We’ll compare the two mechanisms, show how NSEC enables zone walking while NSEC3 mitigates it, and share practical tips for securing your own domains.
CAA (Certificate Authority Authorization) records are DNS records that let you control which Certificate Authorities can issue SSL/TLS certificates for your domain. This article explains the syntax, walks through real-world examples, and shares actionable tips to avoid common pitfalls.
This article explains how DNSSEC signing works, why DNS spoofing and cache poisoning are such dangerous threats, and how digital signatures create a verified chain of trust. It includes real-world attack examples and practical, step-by-step tips for enabling and monitoring DNSSEC on your own domain.
CNAME flattening lets you point your root domain (like example.com) to CDNs and cloud services by resolving CNAME records at the DNS provider level and returning standard A/AAAA records. This article explains how it works, why it matters, and how to avoid common pitfalls like email conflicts and SSL misconfigurations.
EDNS Client Subnet (ECS) is a DNS extension that carries partial client IP information to authoritative name servers, enabling more precise geo-routing and better CDN performance. This article explains the mechanism, real-world impact, and practical configuration steps to get ECS working correctly across your DNS stack.
Email authentication protocols SPF, DKIM, and DMARC work together to verify sender identity, protect your domain from spoofing, and keep your messages out of the spam folder. This guide explains how each protocol works, walks through a practical setup sequence, and highlights the most common mistakes so you can get your email infrastructure right the first time.
GeoDNS and server load balancing are two complementary techniques that keep websites fast and online even under heavy traffic. GeoDNS sends visitors to the nearest available server based on their location, while load balancing spreads the workload across multiple machines to prevent any single server from becoming a bottleneck. This article explains how to combine both for maximum performance and reliability.
A DNS zone transfer attack exploits misconfigured nameservers that allow anyone to copy an entire DNS zone file via an AXFR request. This article explains how zone transfers work, why a leaked zone is dangerous, and how to lock down your nameserver configuration with IP allow-lists and TSIG authentication.
DNS Response Policy Zones (RPZ) give network administrators a powerful, DNS‑level way to block malware and phishing domains before they ever reach their users. This article explains how RPZ works, provides step‑by‑step setup tips, shares a real‑world example, and offers actionable advice for integrating RPZ into your security stack.