23
Chapter 5: Configuring the Gateway
The Security Tab
ADSL2 Gateway with 4-Port Switch
Block WAN requests
• Block Anonymous Internet Requests. This keeps your network from being “pinged” or detected and
reinforces your network security by hiding your network ports, so it is more difficult for intruders to discover
your network. Select Block Anonymous Internet Requests to block anonymous Internet requests or de-
select it to allow anonymous Internet requests.
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.
VPN
Virtual Private Networking (VPN) is a security measure that basically creates a secure connection between two
remote locations. The VPN screen allows you to configure your VPN settings to make your network more secure.
VPN Passthrough
• 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.
• 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
The VPN Gateway creates a tunnel or channel between two endpoints, so that the data or information between
these endpoints is secure.
• To establish this tunnel, select the tunnel you wish to create in the Select Tunnel Entry drop-down box. It is
possible to create up to five simultaneous tunnels. Then click Enabled to enable the IPSec VPN tunnel. Once
the tunnel is enabled, enter the name of the tunnel in the Tunnel Name field. This is to allow you to identify
Figure 5-14: Firewall