The importance of firewall open ports on Linux

Before I was busy setting up the environment, I didn't have time to write it, now fill it up.

On Linux, when we use the one-click installation package to build the environment, the firewall automatically releases. For example, sometimes it is convenient to use tools to remotely connect to Redis for the time being.

Obviously the environment has been set up, the corresponding changes in the configuration is not even, at this time, we should see if our firewall released no

View status: Iptables-l-N

Open firewall ports with Iptables

/sbin/iptables-i input-p TCP--dport the appropriate port-j ACCEPT

Save/etc/rc.d/init.d/iptables Save

Restart Services: Service iptables restart

　　　　　　

Or

Vi/etc/sysconfig/iptables

　　　　　　

Copy a add to the inside, then modify the appropriate port, save, restart/etc/init.d/iptables restart

The importance of firewall open ports on Linux