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  Under Ubuntu on how to use iptables firewall
  Add Date : 2018-11-21      
  Ubuntu and Fedora still some operational differences.

For example, Fedora has its own iptables rules file, Ubuntu is no need to manually build one.

You can use this command: iptables-save> /etc/iptables.up.rules then applied directly when needed is also very simple: iptables-restore < /etc/iptables.up.rules
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