There is an interesting less technical explanation of IPSec posted on AnalogX: http://www.analogx.com/contents/articles/ipsec.htm

Part way down that page is an IPSec template you can download that I've used and found it an effective learning device to get the feel for how to configure IPSec. This is certainly an often overlooked aspect of securing Windows that deserves more attention.

mole
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mole

Who is John Galt?