TLS

Domain Name System ( DNS ) is one of the most critical infrastructure pieces of the internet. Every website visit, API call, or email delivery begins with a DNS query. While most organizations rely on managed DNS providers, self-hosting a DNS nameserver can be a powerful learning experience and, in some cases, a practical solution for greater control, privacy, or experimentation. In this blog, we will: Understand how DNS works at a global scale Explore real-world DNS architecture and infrastructure Walk through self-hosting an authoritative DNS server using PowerDNS This article is aimed at system administrators, DevOps engineers, and curious learners who want to go deeper than “just use a managed DNS provider.” ...

SSL (Secure Sockets Layer) and its successor, TLS (Transport Layer Security), are the cryptographic protocols that secure data transmitted over the Internet. They ensure: Confidentiality: Your data is only accessible to the client and server. Integrity: Your data is not altered in transit. Authentication: You are communicating with the real server. When you see the padlock icon in your browser, that’s TLS protecting your connection. SSL was the original protocol developed at Netscape in 1994, but it is now obsolete due to security flaws. TLS is its modern, secure successor. Today, when people say “SSL,” they almost always mean “TLS.” The current version, TLS 1.3, is faster and more secure than its predecessors. ...