[CentOS] Packet routing diagram (was: Blocking an IP address both as source and destination)
Kenneth Porter
shiva at sewingwitch.comMon Apr 25 22:20:06 UTC 2011
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There's a number of diagrams around the Internet illustrating the path packets take through the Linux kernel, including the various firewall modules, that's quite helpful in understanding which rules should go in which table. Here's one that's not bad: <http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch14_:_Linux_Firewalls_Using_iptables#Figure_14-1_Iptables_Packet_Flow_Diagram> The box labeled "Local Processing of Data" is where packets that are created by the firewall's applications originate. Does anyone have a better diagram? How about one that shows the policy routing system?
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