Add content for iptables (#1978)

content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/118-iptables.md

@@ -1 +1,6 @@
-# Iptables
+# Iptables
+
+IPtables is a command-line firewall utility that uses policy chains to allow or block traffic that will be enforced by the linux kernel’s netfilter framework. Iptables packet filtering mechanism is organized into three different kinds of structures: tables, chains and targets.
+
+<BadgeLink badgeText='Read' colorScheme='yellow' href='https://www.hostinger.in/tutorials/iptables-tutorial'>Iptables tutorial</BadgeLink>
+<BadgeLink badgeText='Read' colorScheme='yellow' href='https://erravindrapawadia.medium.com/iptables-tutorial-beginners-to-advanced-guide-to-linux-firewall-839e10501759'>Beginners to Advanced Guide Iptables</BadgeLink>