I.T. networking is a HUGE topic, and I am by no means going to cover every concept, tool, and scenario. What you will find here is a series of mini-guides designed to help you gain a basic technical understanding of various topics. Whether you are contemplating building or maintaining a firewall, a VPN, a Samba share, or just want to gain a rudimentary understanding of the underlying concepts of networking in Linux, you will find a variety of related articles.

Routes, Rules, and Tables

This category primarily covers:

  1. iptables, iproute, and netfilter
  2. Routing network traffic
  3. How Linux structures network management
  4. Network management tools

The attached paper on Linux Networking Concepts covers all of the above in a single document.

Minor content differences may exist between the information in articles on this website and the document referenced above.

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iptables and iprules

Primarily covers iptables, ipchains, and ip rules. It also touches on ufw (Uncomplicated FireWall), and nftables ("NetFilter Tables"), the successor to iptables.

The following topics are covered:

  1. Packet manipulation
  2. Network traffic filtering
  3. ip tables vs. ip chains
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Virtual Private Networks (VPNs)

This category contains articles about Virtual Private Networks (VPNs), such as what they are, why you may or may not need or want one, how they function, and how to pick the best VPN service provider for you.

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