Simplify the drawing for yourself, if you do not use some of the processes. I hope this helps people to better understand how it all works.", Good ASCII drawing of the ethernet/ip packet journey through the Linux Kernel. Finally, there was a post by Leonardo Balliache that I copied onto this page. Web archive backup (be patient): Kernel Packet Traveling Diagram Quote: ".On the LARTC mailing list, there was a long discussion about how a packet is handled by the kernel.: Internet Firewalls: Frequently Asked Questions Good.: Documentation about the netfilter/iptables project, lists.Comprehensive and well documented NAT-less iptable and startup script:.Kernel space structure - simple packet journey through kernel - Please note that the left and right upper red arrows together, is the input and output of your network device logical network interfaces.IPTABLES - An Overview - short and good - overheads.Firewall Generic and short: Purpose and processes.remote management ( WEB server, Telnet or SSH server), Samba server, PPPoE client, DHCP server(s) or client and so on. The "local process" is your network device's service process(es) - e.g. The five blue balls represent the default firewall chains hook points.
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