VPN
Common VPN Situations
VPN Pass-through
Figure 44: 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 45: 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 LevelOne Broadband VPN Gateway. 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 LevelOne Broad- band VPN Gateway supports IPsec ONLY.
•Windows 2000 and Windows XP include a suitable IPsec VPN client program. Configura- tion of this client program for use with the LevelOne Broadband VPN Gateway is covered later in this document.
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