My company uses the Cisco IPSec VPN and the Cisco VPN client version 4.x I run this under leopard without any problems. However, it is my understanding that this client is end-of-life and does not work in a 64 bit environment. So I would like to use the integrated OSX VPN client, but I am running into issues: In Snow Leopard, I have entered in all the VPN settings, but I always get a "Group password failed" when I try to connect. I am behind a router that is performing NAT. So here are my questions: 1. Does the OSX integrated Cisco IPSec client (configured by adding it into your network preferences) work behind NAT? 2. Is there a 3rd party IPSec VPN client I can use in Snow Leopard and Lion that will function like the Cisco client? 3. Has anyone managed to get this to work in Lion?