How to check whether the firewall is turned on in Linux

Use iptables method, the details are as follows:

First enter the init.d directory, the command is as follows:

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

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Then check the firewall status:

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

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