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Editor to share with you how to configure Linux firewall, open 80, 3306 ports, I believe that most people do not know much, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

What is Linux system Linux is a free-to-use and free-spread UNIX-like operating system, is a POSIX-based multi-user, multi-task, multi-threaded and multi-CPU operating system, using Linux can run major Unix tools, applications and network protocols.

Port 80 is also configured, first enter the firewall configuration file

Shell > # vim / etc/sysconfig/iptables

Add the following two rules:

-An INPUT-m state-- state NEW-m tcp-p tcp-- dport 3306-j ACCEPT

-An INPUT-m state-- state NEW-m tcp-p tcp-- dport 80-j ACCEPT

Special note: many netizens add these two rules to the last line of firewall configuration, resulting in firewall startup failure

The correct thing should be added to the bottom of the default port 22 rule

The added firewall configuration file is as follows:

Restart the firewall, done!

Shell > # service iptables restart

The above is all the contents of the article "how to configure the firewall in Linux to open ports 80 and 3306". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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