There are many things you would like to set up a firewall on Linux, too.Rather, because it is used as a server in a company, it is a place I want to be more careful about than a personal computer.This page tells about iptables to set up firewall on Linux.  table of contents[hide] 1What is a firewall? 2What is iptables? 3iptables setting confirmation and explanation 3.1Chain 3.2Each item 3.3ALL? 3.4Adaptation order of iptables FourHow to […]