This HowTo will cover the basic and advanced steps setting up a VPN using IPsec based on the Linux Kernels 2.4 and 2.5/2.6. Since there is a vast amount of documentation available for the Linux Kernel 2.4, this HowTo will concentrate on the new IPsec Features in the development Kernel first.
A later revision will include Linux Kernel 2.4.
preview:
http://www.ipsec-howto.org/
6/24/2004