User's Guide

Click the Apply button to save your changes or click the Cancel button to discard
your changes.
VPN Passthrough
This page allows you to control VPN tunnels using IPSEC, PPTP, and L2TP protocols
to pass through your Modem Router.
To access the VPN Passthrough page, click Advanced > NAT > VPN Passthrough or
click the VPN Setting button.
IPSEC Passthrough — Internet Protocol Security (IPSec) is a protocol suite used to
secure IP communications by authenticating and encrypting IP packets. Check this
box to enable this function to work through your Modem Router.
PPTP Passthrough — Point-to-Point Tunneling Protocol (PPTP) allows Point-to-Point
protocol (PPP) to be tunneled through a network. Check this box to enable this
function to work through your Modem Router.
L2TP Passthrough — Layer 2 Tunneling Protocol (L2TP) is an extension to the PPP
protocol that enables ISPs to operate VPNs. Check this box to enable this function to
work through your Modem Router.
It is recommended to retain the default ports of these protocols.
Click the Apply button to save your changes or click the Cancel button to discard
your changes.