Linux Router - FirewallD Simple NAT - RHEL 7 / CentOS 7 / Fedora 20+ - YouTube
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![How add rule to iptables in Linux CentOS 7 [Block other DNS] - CentOS](http://i.imgur.com/pSxtggI.png "How add rule to iptables in Linux CentOS 7 [Block other DNS] - CentOS")
How add rule to iptables in Linux CentOS 7 [Block other DNS] - CentOS
