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如何恢復iptables的默認設置

   /usr/local/sbin/iptables -P INPUT ACCEPT

  /usr/local/sbin/iptables -P FORWARD ACCEPT

  /usr/local/sbin/iptables -P OUTPUT ACCEPT

  #

  # reset the default policies in the nat table.

  #

  /usr/local/sbin/iptables -t nat -P PREROUTING ACCEPT

  /usr/local/sbin/iptables -t nat -P POSTROUTING ACCEPT

  /usr/local/sbin/iptables -t nat -P OUTPUT ACCEPT

  #

  # flush all the rules in the filter and nat tables.

  #

  /usr/local/sbin/iptables -F

  /usr/local/sbin/iptables -t nat -F

  #

  # erase all chains that's not default in filter and nat table.

  #

  /usr/local/sbin/iptables -X

  /usr/local/sbin/iptables -t nat -X'

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