I'm running pfSense 2.0 firewall at home and want to be able to VPN into my home network from my iPhone (and other devices). I was able to get PPTP working, but ipSec fails to connect (I can post ...

Also, the IETF’s IPsec Working Group is studying how to extend the Internet key exchange for network-address translators and firewalls.

Uh, what does this mean? I'm attempting to set up IAS/RADIUS/RRAS with L2TP/IPSec. PPTP works just fine, but I cannot get L2TP/IPSec working.Computer/User have valid certs from the Enteprise CA.

The IPSec working group of the IETF has created standards for NAT-T that are defined in RFCs 3947 and 3948. NAT-T is designed to solve the problems inherent in using IPSec with NAT.