The useful links page has a few problems: NIST guide http://csrc.nist.gov/publications/nistpubs/800-41-Rev1/sp800-41-rev1.pdf PPPPPPPS - good Netfilter site - good LARTC - good Clustering - good Iproute - obsolete? Iproute2 Downloads - https://www.kernel.org/pub/linux/utils/net/iproute2/ LEAF - good Behring - good iptables tutorial https://www.frozentux.net/documents/iptables-tutorial/ Debian sources - good About the author - good Toms presentations - good Shorewall CIA tracker - *dead* Regards -- lee ------------------------------------------------------------------------------ HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems