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{{tag>firewall iptables shorewall}}

====== Save iptables rules and clear firewall ======
Useful for debugging.

First, save the current firewall config:

  iptables-save > /root/firewall.rules
  ip6tables-save > /root/firewall6.rules

Then, flush and open all the firewall rules using the following commands:

  iptables -F
  iptables -X
  iptables -t nat -F
  iptables -t nat -X
  iptables -t mangle -F
  iptables -t mangle -X
  iptables -P INPUT ACCEPT
  iptables -P OUTPUT ACCEPT
  iptables -P FORWARD ACCEPT

For IPv6 rules, substitute ip6tables instead of iptables.

After testing, you can re-enable your firewall rules by running the following:

  iptables-restore < /root/firewall.rules
  ip6tables-restore < /root/firewall6.rules




====== Tested on ======
  * 

====== See also ======

====== References ======