How to disable Firewall on RHEL / CentOS / RedHat Linux

How do I turn off or disable firewall permanently under RHEL / Fedora Linux / Red Hat Enterprise Linux and CentOS Linux?

iptables is administration tool / command for IPv4 packet filtering and NAT.

You need to use the following tools:

 

First login as the root user.

Next enter the following three commands to disable firewall.
# service iptables save
# service iptables stop
# chkconfig iptables off

If you are using IPv6 firewall, enter:
# service ip6tables save
# service ip6tables stop
# chkconfig ip6tables off
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