Para el que solicit� un documento sobre iptables. --- The Avenger GNU <[EMAIL PROTECTED]> a �crit : > �: [EMAIL PROTECTED] > De: The Avenger GNU <[EMAIL PROTECTED]> > Date: 31 May 2001 23:14:42 -0400 > R�pondre �: [EMAIL PROTECTED] > Objet: [apnews] Iptables Tutorial > > http://www.linuxsecurity.com/articles/firewalls_article-3098.html > > Iptables Tutorial Pinehead.com Posted By: Chris Pallack 5/31/2001 > 13:17 > > I'm sure many of you have been wondering how to use iptables to set up > a basic firewall. I was wondering the same thing for a long time until > I recently figured it out. I'll try to explain the basics to at least > get you started. > > First you need to know how the firewall treats packets leaving, > entering, or passing through your computer. Basically there is a chain > for each of these. Any packet entering your computer goes through the > INPUT chain. Any packet that your computer sends out to the network > goes through the OUTPUT chain. Any packet that your computer picks up > on one network and sends to another goes through the FORWARD > chain. The chains are half of the logic behind iptables themselves. > > Now the way that iptables works is that you set up certain rules in > each of these chains that decide what happens to packets of data that > pass through them. For instance, if your computer was to send out a > packet to www.yahoo.com to request an HTML page, it would first pass > through the OUTPUT chain. The kernel would look through the rules in > the chain and see if any of them match. The first one that matches > will decide the outcome of that packet. If none of the rules match, > then the policy of the whole chain will be the final decision > maker. Then whatever reply Yahoo! sent back would pass through the > INPUT chain. It's no more complicated than that. > > -- > > To Post a message, send it to: [EMAIL PROTECTED] > > To Unsubscribe, send a blank message to: [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > >
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