Article ID:543
Objective
VPN (Virtual Private Network) Passthrough is an option available on routers which permits computers on a private network to establish a fluid connection to an outbound VPN. Most routers implement a feature known as NAT (Network Address Translation), which allows multiple devices within a private network to have the same public IP address (both for security reasons as well as preservation of available public IP addresses). By default, PPTP and IPSec do not work with NAT. With the passthrough feature, PPTP and IPSec become compatible with NAT. The RVS4000 supports IPSec, PPTP, and L2TP passthrough.
This article explains how to configure VPN passthrough on the RVS4000.
Applicable Device
• RVS4000
Software Version
• 2.0.3.2
VPN Clients Status
Step 1. Log in to the Router Configuration Utility and choose VPN > VPN Passthrough. The VPN Passthrough page opens:
Step 2. Click the Enable radio button in the IPSec PassThrough field to allow IPSec tunnels to pass through the router. This option should be enabled when an IPSec VPN tunnel is in use on the RVS4000 or if the RVS4000 lies between two end points of an IPSec VPN tunnel.
Step 3. Click the Enable radio button in the PPTP PassThrough field to allow PPTP tunnels to pass through the router. This option should be enabled when the RVS4000 lies between two end points of a PPTP VPN tunnel.
Step 4. Click the Enable radio button in the L2TP PassThrough field to allow L2TP tunnels to pass through the router. This option should be enabled when the RVS4000 lies between two end points of a L2TP VPN tunnel.
Step 5. Click Save. The VPN passthrough configuration is saved.