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http://www.cromwell-intl.com/SECURITY/security-stack-hardening.html

http://www.psc.edu/networking/projects/tcptune/ These notes are intended to help users and system administrators maximize TCP/IP performance on their computer systems. They summarize all of the end-system (computer system) network tuning issues including …

http://www.hackinglinuxexposed.com/articles/20021015.html There are several network-related protections you can enable with simple change to the Linux kernel via /proc pseudo files.

http://www.reems.serverthuis.nl/ tweak some kernel variables through sysctl and get much better performance….

http://www.maxkiesler.com/ full of ajax

http://www.logahead.com/