Adding a VPN gateway and other resources to the Trusted Zone

In addition to the VPN gateway, There may be other VPN-related resources that need to be in the Trusted Zone for your VPN to function properly.

Required VPN-related network resources
Required Resources	Other Resources
The resources below are required by all VPN client computers and must be added to the Trusted Zone.	The resources below may or may not be required, depending on your specific VPN implementation.
VPN Concentrator	DNS servers
Remote host computers connected to the VPN client (if not included in the subnet definitions for the corporate network)	Local host computer's NIC loopback address (depending on Windows version). If you specify a local host loopback address of 127.0.0.1, do not run proxy software on the local host.
Corporate Wide Area Network (WAN) subnets that will be accessed by the VPN client computer	Internet Gateway
Corporate LANs that will be accessed by the VPN computer	Local subnets
Corporate LANs that will be accessed by the VPN computer	Security servers (for example, RADIUS,ACE, or TACACS servers)