Broadband VPN Gateway User Guide
Common VPN Situations
VPN Pass-through
Figure 43: VPN Pass-through
Here, a PC on the LAN behind the Router/Gateway is using VPN software, but the Router/Gateway is NOT acting as a VPN endpoint.
It is only allowing the VPN connection.
• The PC software can use any VPN protocol supported by the remote VPN.
• The remote VPN Server must support client PCs which are behind a NAT router, and so have an IP address which is not valid on
the Internet.
• The Router/Gateway requires no VPN configuration, since it is not acting as a VPN endpoint.
Client PC to VPN Gateway
Figure 44: Client PC to VPN Server
In this situation, the PC must run appropriate VPN client software in order to connect, via the Internet, to the Broadband VPN Gate-
way. Once connected, the client PC has the same access to LAN resources as PCs on the local LAN (unless restricted by the network
administrator).
• IPsec is not the only protocol which can be used in this situation, but the Broadband VPN Gateway supports IPsec ONLY.
• Windows 2000 and Windows XP include a suitable IPsec VPN client program. Configuration of this client program for use with
the Broadband VPN Gateway is covered later in this document.
72
