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security

CAA Records Explained: How to Restrict Which Certificate Authorities Can Issue SSL/TLS Certificates for Your Domain

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.

Aug 28, 2026 0 views

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security

DNSSEC Signing Explained: How to Protect Your Domain from DNS Spoofing and Cache Poisoning

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.

Aug 25, 2026 3 views

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dns

DNS CNAME Flattening Explained: How to Use Apex Domains with CDNs and Cloud Services

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.

Aug 22, 2026 4 views

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domain-tools

RDAP vs WHOIS: Key Differences and Why RDAP Is the Future of Domain Data Lookup

RDAP is the modern replacement for WHOIS, offering structured JSON data, HTTPS security, and standardized error responses. This article compares the two protocols and explains why ICANN's mandate makes RDAP essential for domain professionals.

Aug 16, 2026 12 views

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dns

EDNS Client Subnet Explained: How It Improves CDN Performance and DNS Accuracy

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.

Aug 13, 2026 10 views

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dns

SPF, DKIM, and DMARC Explained: How to Set Up Email Authentication to Avoid Spam and Spoofing

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.

Aug 7, 2026 34 views

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dns

How to Use GeoDNS and Server Load Balancing to Improve Website Performance and Availability

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.

Aug 4, 2026 23 views

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security

DNS Zone Transfer Attacks: What They Are and How to Protect Your Nameserver Configuration

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.

Aug 1, 2026 25 views

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security

DNS Response Policy Zones (RPZ): How to Use Them to Block Malware and Phishing Domains

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.

Jul 31, 2026 48 views

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domain-investing

Domain Name Flipping: A Beginner’s Guide to Buying and Selling Domains for Profit

Domain flipping—buying low and selling high—can be a lucrative side hustle or full-time business. This guide walks you through the process, from researching profitable domains to pricing and selling them, with practical tips and real-world examples to help you avoid common rookie mistakes.

Jul 28, 2026 28 views

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