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Chapter 5: Configuring the ADSL Gateway
The Security Tab
ADSL Gateway
Page button to go to the previous page of information. Click the Next Page button to move to the next page of
information.
When finished making your changes on this tab, click the Save Settings button to save these changes, or click
the Cancel Changes button to undo your changes.
The VPN Tab
This panel shows VPN (virtual private network) settings. You can disable or enable passthrough for four kinds of
VPNs. You can also set up IPSec (Internet Protocol Security) VPN tunnels for secure remote access.
VPN Passthrough
Virtual Private Networking (VPN) is a security measure that basically creates a secure connection between two
remote locations. Configure these settings so the Gateway will permit VPN tunnels to pass through.
• IPSec Passthrough. Internet Protocol Security (IPSec) is a suite of protocols used to implement secure
exchange of packets at the IP layer. To allow IPSec Passthrough, click the Enable button. To disable IPSec
Passthrough, click the Disable button.
• PPPoE Passthrough. PPPoE Passthrough allows your PC(s) to use the PPPoE client software provided by your
ISP. Some ISPs may request that you use this feature on the Gateway. To allow PPPoE Passthrough, click the
Enable button. To disable PPPoE Passthrough, click the Disable button.
• PPTP Passthrough. Point-to-Point Tunneling Protocol Passthrough is the method used to enable VPN sessions
to a Windows NT 4.0 or 2000 server. To allow PPTP Passthrough, click the Enable button. To disable PPTP
Passthrough, click the Disable button.
• L2TP Passthrough. Layering 2 Tunneling Protocol Passthrough is an extension of the Point-to-Point Tunneling
Protocol (PPTP) used to enable the operation of a VPN over the Internet.To allow L2TP Passthrough, click the
Enable button. To disable L2TP Passthrough, click the Disable button.
IPSec VPN Tunnel
Use this section of the VPN panel to set up, enable, and disable secure IPSec tunnels between the Gateway and
remote IPSec gateways and clients. Note that you must have a working ADSL connection to complete the settings
in this section.
• Select Tunnel Entry: You can enable up to five IPSec tunnels. Each has a number and a name. Use this
control to select the one you want to enable, disable, edit, or delete.
Figure 5-19: The VPN Panel