How to check firewall status in Linux

There are two ways to check the firewall in Linux:

1. Service method

Check the firewall status:

[root@centos6 ~]# service iptables status
iptables：未运行防火墙。

Turn on the firewall:

[root@centos6 ~]# service iptables start

Turn off the firewall:

[root@centos6 ~]# service iptables stop

2. iptables method

Enter init first. d directory, the command is as follows:

[root@centos6 ~]# cd /etc/init.d/
[root@centos6 init.d]#

Check the firewall status:

[root@centos6 init.d]# /etc/init.d/iptables status

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