Modern Linux kernels come with a packet-filtering framework named Netfilter. Netfilter enables you to allow, drop, and modify traffic coming in and going out of a system. The iptables userspace command-line tool builds upon this functionality to provide a powerful firewall, which you can configure by adding rules to form a firewall policy. iptables can be very daunting with its rich set of capabilities and baroque command syntax.
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Author: greptile
Published at: Mon, 01 Oct 2018 03:02:00 -0400
Credits: https://www.opensource.com
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