May 24, 2021 That's what Linux should learn
In earlier Linux systems, the default was the iptables firewall management service to configure the firewall. A lthough the new Firewalld firewall management service has been in use for many years, a large number of enterprises continue to use iptables in production environments for a variety of reasons. C onsidering that iptables still have a tenacious vitality in the current production environment, and in order to enable you to be asked about the relevant knowledge of iptables during the job interview process, Mr. Liu felt it was still necessary to explain the technology in this book. What's more, as mentioned earlier, the configuration ideas of each firewall management tool are consistent, and it is also useful to learn about other firewall management tools after mastering the iptables.