I have a Pix 506e. Thanks to all of your previous posts, it is up and running great. I can VPN into the Pix if I turn xauth off. The minute I turn xauth on and point it to my WIN2k3 server running IAS I get a user not authenticated error. I'm not sure why either. I have followed the Cisco configuration for this precisely, and still can't get connected. If anyone has seen this please let me know how to fix it. Thanks.