Expert guides on domain registration, WHOIS lookup, DNS, SSL, and domain investing.
Domain typo squatting is a harmful practice where cybersquatters register misspelled versions of popular domains to steal traffic or perpetrate scams. This article explains how to detect typo squatting attacks on your brand and provides actionable prevention techniques using both manual checks and specialized network tools.
SSL certificate revocation is a critical but often overlooked aspect of website security. This article explains how Certificate Revocation Lists (CRLs) and the Online Certificate Status Protocol (OCSP) work, covers modern advancements like OCSP stapling and Must-Staple, and provides actionable steps to verify revocation status in 2026 using free tools and command-line checks.
Certificate Transparency logs provide a powerful, publicly accessible record of all SSL/TLS certificates issued for domains. By monitoring these logs, you can detect phishing domains that impersonate your brand with lookalike certificates, often issued within minutes of registration. This guide explains how to query CT logs, spot suspicious certificates, and integrate this intelligence into your security routine—with practical tips and real-world examples.
DNS propagation is the time it takes for your domain’s new DNS records to be distributed across the internet’s global network of servers. This article explains why propagation isn’t instant, how to check its status, and practical steps to minimise downtime when making changes.
DNS queries are often transmitted unencrypted, leaving your browsing habits exposed. DNS Over HTTPS (DoH) encrypts those queries to enhance privacy and prevent tampering. This guide explains how DoH works, how to enable it in your browser and operating system, and how to verify it's working using tools like the Whose.Domains DNS Analyzer.
Reverse WHOIS lookup lets you find every domain registered to the same person or organization, revealing hidden connections between websites. This guide explains how reverse WHOIS works, real-world use cases for cybersecurity and competitor research, and actionable tips to get the most out of it. You’ll also learn how to use simple tools like WHOIS Lookup to start your own reverse WHOIS investigations.
Domain hijacking can cripple your online presence, from lost email to stolen traffic. This guide covers proactive prevention tips—like enabling registrar lock and two-factor authentication—plus actionable recovery steps if your domain is taken. Learn how to safeguard your digital assets before it's too late.
DNS CAA (Certification Authority Authorization) records let domain owners specify which certificate authorities (CAs) are allowed to issue SSL/TLS certificates for their domain. By adding a CAA record, you reduce the risk of rogue or unauthorized certificate issuance, closing a common vector for man-in-the-middle attacks. This article explains how CAA records work, how to set them up, and how tools like a DNS analyzer can help you verify your configuration.
Being blacklisted can destroy your email deliverability and tank your website traffic. This guide shows you how to quickly check if your domain is on any major blocklist, explains the most common causes, and gives you a step-by-step action plan to get delisted and stay clean.
A reverse IP lookup reveals all domains hosted on a single server by querying DNS records. This guide explains how to use the technique for security analysis, competitive research, and server management, with practical tips and real-world examples. You'll learn to identify shared hosting risks and uncover hidden relationships between websites.