DNS

Google Public DNS is a free, globally distributed Domain Name System resolver operated by Google, reachable at 8.8.8.8 (primary) and 8.8.4.4 (secondary). Replacing your ISP's default DNS servers with these addresses can reduce DNS lookup latency, harden your resolver against cache poisoning attacks, and eliminate single points of failure caused by regional ISP outages. This […]

Email remains the backbone of digital communication for businesses and individuals alike, yet its underlying mechanics are poorly understood by most of its users. At its core, email delivery is a multi-stage relay process governed by a precise chain of protocols — SMTP for transmission, DNS MX records for routing, and IMAP or POP3 for […]

DNS (Domain Name System) is a hierarchical, distributed naming system that translates human-readable domain names — such as `www.example.com` — into machine-readable IP addresses like `192.0.2.1`. Without DNS, every internet user would need to memorize numeric addresses for every website, API endpoint, or mail server they interact with. DNS is the protocol that makes the […]

Reverse DNS (rDNS) records, also known as PTR records, are essential components of the Domain Name System (DNS) that map an IP address back to a domain name. This process is the opposite of the traditional DNS lookup, which maps domain names to IP addresses. rDNS records are crucial for verifying the authenticity of mail […]

Transferring a domain name to a new registrar is one of the most consequential administrative tasks a website owner or systems administrator performs. Done correctly, it is seamless and causes zero downtime. Done incorrectly, it can result in DNS propagation failures, locked domains, expired authorization codes, or even accidental service interruptions lasting days. This guide […]

Nameservers (NS records) are the authoritative DNS pointers that tell the global DNS infrastructure which servers hold the definitive zone file for your domain. Without correctly configured NS records, your domain cannot resolve — regardless of how well-configured your web server, mail system, or SSL certificates are. This guide covers AlexHost's specific nameserver infrastructure, explains […]

DNS (Domain Name System) is the foundational protocol that translates human-readable domain names — such as www.example.com — into machine-readable IP addresses that servers use to route traffic across the internet. Without a properly configured DNS service, your domain is unreachable, your email fails to deliver, and your SSL certificates cannot validate. This guide walks […]