Hello:
	I'm studying the Netfilter architecture, and I have read the
"Linux netfilter Hacking HOWTO", but I have some problems to understand
many things about it talks about, so I would like to know if there is
another document explaining Netfilter architecture, or if it doesn't
exists, where I can find some help (maybe a Linux kernel book or
something similar) to understand all the concepts.

	Thank you very much


	Juan