Disable iptables from CentOS.

Intro.

By default, CentOS comes with iptables enabled and some basic firewall rules ON.

You can verify the iptables firewall status by launching the following command:

CentOS iptables default rules.

iptables -L

Those are the default CentOS rules and they're just waiting to be customized by you!

- For example, you may wish to ALLOW HTTP traffic like so:

# Allows HTTP Traffic.
-A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT

- Or maybe you're willing to allow MySQL traffic?

# Allows MySQL Traffic.
-A INPUT -i eth0 -p tcp --dport 3306 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT

- What about allowing SSH only to a particular subnet?

# Allows SSH to 10.100.100.0/24.
-A INPUT -p tcp -s 10.100.100.0/24 --dport 22 -j ACCEPT

Sorry, I forgot to tell you'll have to edit /etc/sysconfig/iptables (make a backup copy first!), then restart the daemon!

Alright, alright, if you really must:

CentOS Disable iptables.

chkconfig iptables off
chkconfig ip6tables off

Have phun (no phun intended)!

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Senior Professional Network and Computer Systems Engineer during work hours and father when home.

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