IP Security. (Fill me in!)
Back ported from IPv6 into IPv4.
Two types: ESP and AH.
Uses IKE for connection and key negotiation.
See IPSecInstallation and IPSecConfiguration.
For specific configuration information, see IPSecConfigurationPSK and IPSecConfigurationRSA. For performance related information, see IPSecBenchmarks.
To create a tunnel to a Cisco PIX unit, see FreeSwanToCiscoPix.
If you are a Microsoftie, you might want to look at PPTP instead.
28 pages link to IPSec: