This article walks you through configuring a Linux DNS server with BIND, covering DNS fundamentals, server setup, named.conf options, forward and reverse zone definitions, record creation, client testing, and troubleshooting tips, all illustrated with code snippets and screenshots.
Explore the essential role of DNS in the internet, learn how Linux resolves domain names, configure resolvers via /etc/resolv.conf, NetworkManager, systemd-resolved, set up a BIND9 server with zone files, and discover advanced techniques like DNSSEC, DoH, split views, and troubleshooting tools.
This article explains Linux routing fundamentals, describing how routing tables are used to select interfaces and next hops, detailing the six-step packet routing process, and providing step‑by‑step commands and examples for adding and removing host, network, and default routes on Linux systems.
Learn how to use OpenSSH for local, remote, and dynamic port forwarding, including command syntax, practical scenarios, configuration tips, and methods to keep connections alive, enabling secure access to internal services across NAT and firewalls.
Learn how to create secure SSH tunnels using local, remote, and dynamic port forwarding, with step‑by‑step command examples, option explanations, and practical network diagrams that show how to access otherwise unreachable hosts and services through intermediate jump hosts.
This article provides a comprehensive overview of Linux fundamentals, covering directory structure, kernel architecture, essential commands, and advanced piping techniques for system administration and development.
This guide explains how to use the Linux route command to display the IP routing table, install the necessary net‑tools package, and perform common operations such as adding, deleting, and blocking routes, including options for persistence and detailed output interpretation.
This guide explains how to install iproute2, use the ip command to configure IP addresses, manage routing tables, monitor network statistics, handle ARP entries, and troubleshoot Linux networking, providing clear examples and command-line snippets for system administrators.
