How to modify your firewall (iptables) setting with Centos

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With GUI

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Yes it’s easy but you can only have very simple rules.

File modification

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You can directly modify the file generated by the GUI but beware never use the gui after or you’ll loose everything. So to sum up :

• Modify the following file : /etc/sysconfig/iptables.
• Restart the service : /etc/init.d/iptables restart