"0 to IPSEC in 4 minutes (To a Cisco!) (http://undeadly.org/cgi?action=article&sid=20080711190301)" - пример настройки IPSEC между OpenBSD и Cisco 2621.URL: http://undeadly.org/cgi?action=article&sid=20080711190301
Новость: http://www.opennet.me/opennews/art.shtml?num=16945
Ошибка там в конфигурации cisco
crypto map не приложили