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Nov 12th, 2018
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  1.  
  2. sudo iptables -P INPUT ACCEPT
  3. sudo iptables -P OUTPUT ACCEPT
  4. sudo iptables -F
  5. sudo iptables -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
  6. sudo iptables -A OUTPUT -p tcp -m tcp --sport 22 -j ACCEPT
  7. sudo iptables -A INPUT -i lo -j ACCEPT
  8. sudo iptables -A OUTPUT -o lo -j ACCEPT
  9. sudo iptables -A INPUT -j REJECT
  10. sudo iptables -A OUTPUT -j REJECT
  11. sudo ip6tables -A INPUT -j REJECT
  12. sudo ip6tables -A OUTPUT -j REJECT
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