WebVPN does not use the DNS settings of the group with which it has connected. WebVPN follows the VPN Concentrator global DNS settings. This can be confusing to administrators who have users assigned to the same group and who get different DNS results. Ensure that the global DNS settings of the VPN Concentrator have been configured properly.
Using a RADIUS server to authenticate users, assign users to groups by following these steps:
Authenticate the user with RADIUS and use the Class attribute to assign that user to a particular group.
Set the class attribute to the group name in the format OU=group_name