gentoo iptables information

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I finally found how to search for useful gentoo iptables information and 
it's something those new to iptables won't think obvious.  The trick is to 
search for gentoo netfilter tutorial OR howto on google.com.  netfilter 
appears to be the larger project encompassing iptables and ipchains and 
ip6tables.  The other tip on reading stuff about iptables on the web is to 
remember with firewalls you close everything down first then open up 
certain specific access paths.  You will find misinformation on the web 
advocating setting up specific access paths first then denying everything 
else.  It doesn't work that way according to peter.youssef at navy.mil, 
denying everything as the last rule in a firewall breaks all specific 
access paths you defined in earlier rules and leaves you with a closed 
system.  Cybercrackers can and do write web pages too.






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