Category: DNS Protocols

DNS tunneling is a technique that exploits the Domain Name System (DNS) protocol to transmit data covertly between systems, often bypassing traditional network security measures. While DNS is primarily designed for resolving domain names into IP addresses, its flexibility and widespread use make it an attractive vector for abuse. Malicious actors have leveraged DNS tunneling…

The transition from IPv4 to IPv6 is a pivotal development in the evolution of internet infrastructure, driven by the rapid depletion of IPv4 addresses and the need to accommodate the exponential growth of connected devices. As the foundational system for resolving domain names to IP addresses, DNS plays a critical role in this transition, ensuring…

Split-horizon DNS, also known as split-view DNS, is a strategic approach to managing DNS queries in enterprise environments where internal and external users require access to different views of DNS data for the same domain. By presenting distinct sets of DNS records based on the source of a query, split-horizon DNS enhances security, optimizes resource…

As container orchestration platforms like Kubernetes become the backbone of modern application deployment, the role of DNS in ensuring seamless service discovery and communication within clusters has grown exponentially. Kubernetes manages dynamic environments where applications, services, and nodes are constantly being created, scaled, or destroyed. Traditional DNS systems, while robust for static or moderately dynamic…

DNS rate limiting and traffic management are essential techniques for ensuring the stability, security, and performance of DNS infrastructure in an increasingly connected world. As the internet expands, DNS servers face ever-growing volumes of queries from legitimate users, as well as potential threats from malicious actors. Properly managing this traffic is critical to maintaining a…

DNS-Based Service Discovery (DNS-SD) is a protocol designed to extend the capabilities of the Domain Name System (DNS) to facilitate the dynamic discovery of services on a network. Unlike traditional DNS, which resolves domain names to IP addresses, DNS-SD enables devices and applications to identify available services, their locations, and their characteristics without requiring prior…

The Domain Name System (DNS) is often described as the backbone of the internet, a foundational service that ensures the smooth translation of human-readable domain names into the machine-readable IP addresses required for digital communication. While largely invisible to end users, DNS plays a critical role in enabling nearly all internet services, from web browsing…

The increasing reliance on secure communication over the internet has brought heightened attention to the vulnerabilities in existing protocols for Transport Layer Security (TLS). One of the emerging solutions to address these vulnerabilities is the use of TLSA records in conjunction with DNS-Based Authentication of Named Entities (DANE). By leveraging the Domain Name System (DNS)…

Reverse DNS, the process of mapping an IP address back to a domain name, is an essential aspect of modern network management and a key feature of the Domain Name System (DNS). At the heart of reverse DNS lies the Pointer (PTR) record, a specialized DNS record type used to link an IP address to…

Public DNS resolvers are an essential component of internet infrastructure, providing users with reliable and efficient domain name resolution services. While internet service providers typically offer their own DNS resolvers, many users and organizations opt for third-party public DNS resolvers to enhance performance, privacy, and security. Among the most widely used public DNS resolvers are…