Introduction to Kernel
0. Where to get the latest kernel
3. Kernel configuration option help:
Non-network related part. PDF,
PostScript, DOC
Network options part.
PDF,
PostScript, DOC
Topics on Advanced Routing
Linux 2.4 Advanced Routing HOWTO
The Netfilter Project: Packet Mangling for Linux 2.4
1. Linux 2.4 Packet Filtering HOWTO (PS version)
3. Linux netfilter Hacking HOWTO (PS version)
Use Linux as a Bridge HowTo, Common Problems FAQ CookBook
Linux Bridging and Firewall HowTo
Network performance measurement tools
Network Traffic Measurement Tools
Performance Measurement Tools Taxonomy
Learn to use tcpdump ifconfig route netstat by example
Learn to use GNUplot by example here Another good resource for gnuplot here
Learn to change kernel parameter by manipulating /proc file system here
Do you know that some ip addresses are private? They don't use default route. Find more here
Find all RFCs HERE