iptables 3306 rules not saving

I am inserting the rule property :: saving :: restarting and the rule is not committed. I am doing the following:

Step 1:

iptables -A INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT

Step 2:

service iptables save

Step 3:

service iptables restart

Step 4:

I simply rebooted the machine.

When I do:

iptables --list-rules
I don't see the rule committed and I cannot connect from the outside.

Note:
I saw a complex version of this rule: iptables -I INPUT -i eth0 -p tcp -s 1.1.1.2 -d 1.1.1.1 --destination-port 3306 -j ACCEPT
Starquest321Asked:
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Starquest321Author Commented:
Running a CENT OS 7 Box
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Starquest321Author Commented:
Note: When I tried to use the setup system-config I got the following error:

ERROR: FirewallD is active, please use firewall-cmd.
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gheistCommented:
iptables/system-config-firewall-tui are now replaced by firewalld.
to get old behaviour disable and stop firewalld (chkconfig firewalld off ; service firewalld stop)
enable and start ip(6)tables
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Starquest321Author Commented:
so how do I use the firewalld - is that easier?
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Starquest321Author Commented:
What are the exact commands to enable iptables?
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gheistCommented:
firewalld is managed by firewall-config (both have manual pages)

iptables:
yum install system-config-firewall-tui
now run system-config-firewall-tui and allow at least SSH protocol (press once OK, it saves config, but fails, then cancel to exit, without this you lose remote access to system)
chkconfig iptables on ; service iptables start
chkconfig ip6tables on ; service ip6tables start

(between the lines you will learn something about how RHEL7 is different from RHEL6)
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Starquest321Author Commented:
when I install iptables -- does that mean I am turning off firewalld?
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gheistCommented:
No, you have to explicitly switch it off and stop
Then configure rule for SSH (http, ... etc to allow extant service)
And then start and enable iptables
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