How to modify your firewall (iptables) setting with Centos

With GUI

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

File modification

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