Security is one of the main issue in IT Industry. We want some robust, flexible, affordable and Open Source based security solution. Iptables Firewall satisfy all these requirements. This course will start from basics and will slowly and slowly takes you into depth of Firewall

Firewall is basically a system that prevents unauthorized communication.

- to it (INPUT)

- from it (OUTPUT)

- through it (FORWARD)

The Iptables firewall is open source, low cost (or you can say no cost at all) and highly flexible stateful firewall. To properly understand firewall, we will be discussing several different scenarios. You will be able to appreciate the power of Linux based Iptables firewall after going through different examples.