I'm trying to configure an IPsec VPN connexion with OpenBSD as a VPN Server with 3-DES for the Encryption, HMAC-SHA-1 for the Integrity, and PresharedKey for the Authentification.
My Questions are :
i have found in the past these guides very useful.
if you want to use l2tp/ipsec with npppd check out this undeadly article.
finally if you plan to use openvpn we have assembled a small guide at our site.