How to configure Firewall in CentOS

This article introduces how to configure firewalls in CentOS, the content is very detailed, interested friends can refer to it, I hope it can help you.

CentOS configuration firewall operation example (start, stop, open, close port):

Note: Basic operation commands of firewall:

Query firewall status:

[root@localhost ~]# service iptables status

Stop Firewall:

[root@localhost ~]# service iptables stop

Start firewall:

[root@localhost ~]# service iptables start

Restart firewall:

[root@localhost ~]# service iptables restart

*** Close firewall:

[root@localhost ~]# chkconfig iptables off

*** Enable after closing:

[root@localhost ~]# chkconfig iptables on

1. View firewall status

[root@localhost ~]# service iptables status

Edit the file/etc/sysconfig/iptables. In our example, we want to open ports 8080 and 9990

Open/etc/sysconfig/iptables in an editor

3, according to the gourd painting, we add 8080 port and 9990 port

4. Save the/etc/sysconfig/iptables file and execute it on the terminal

[root@localhost ~]# service iptables restart

5. View firewall status from scratch

[root@localhost ~]# service iptables status

At this time, the 8080 and 9990 ports of the server can provide services to the outside world.

7. The open mode of other ports is similar to this open mode.

CentOS on how to configure the firewall to share here, I hope the above content can be of some help to everyone, you can learn more knowledge. If you think the article is good, you can share it so that more people can see it.