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This article provides an insight to what are IPtables, how are they related to Netfilters and how basic packet filtering happens through IPtables.
Linux today is the fastest growing operating system that is replacing it’s competitors in almost every sphere of technology field. The major reason for this is the simplicity and robustness of this operating system. Besides, there is another quality in Linux that makes it favourite of many. This quality is the seamless customization that can be done with every aspect of this OS. One of the very important aspect is the Linux security. There are many protections and inbuilt security mechanisms that Linux incorporates in the name of system and network security. One of the inbuilt security mechanism is the Linux firewall. Linux provides a very flexible and powerful mechanism to customize the firewall. This mechanism is the Linux IPtables.
This is the topic of discussion for this article. Lets discuss the basics of netfilter/Iptables framework in the following sections.
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