4. Networking -Management, Firewall, Masquerading and Forwarding

Until now, we have not tinkered with the networking capabilities of Linux. Linux is one of the best existing operating systems in the world for networking features. Most Internet sites around the world already know this, and have used it for quite some time. Understanding your hardware network and all files related to it is very important if you want to have a full control of what happens on your server. Good knowledge of primary networking commands is vital. Network management covers a wide variety of topics. In general, it includes gathering statistical data and status of parts of your network, and taking action as necessary to deal with failures and other changes.