At the time of writing missing in vanilla up to 2.4.28. There was an issue about keeping the Linux kernel source free of export/import-control-laws regarding encryption code. This is also one case why FreeS/WAN project wasn't included in vanilla source. Perhaps a backport from 2.6.x will be done in the future.
Current versions (as time of writing 2.6.9 and upper) support native IPsec for IPv4 and IPv6.
Implementation was helped by the USAGI project.
Your connection is via:
Your address: 184.108.40.206
is maintained by
webmaster at bieringer dot de
IPv4 connectivity is provided by