User's Manual

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SMCD3GN2 Wireless Cable Modem Gateway Administrator Manual
Table 32. SNTP Settings Menu Options
Option Description
Enable SNTP Client Enables or disables the Gateway to be set up as an SNTP client.
• Checked = Gateway can be set up as an SNTP client. The remaining fields in the menu
become available.
• Unchecked = Gateway cannot be set up as an SNTP client. The remaining fields in the
menu remain gray and unavailable. (default)
Assign SNTP Server IP address or host name of the SNTP server. This field is not available if Enable SNTP Client
is not checked.
Time Zone Time zone to be used for SNTP operations. This field is not available if Enable SNTP Client is
not checked.
Configuring VPN Settings
A Virtual Private Network (VPN) is a technology designed to increase the security of
information transferred over the Internet. A VPN creates a private encrypted tunnel from the
user's computer, through the local wireless network, through the Internet, all the way to the
corporate servers and database.
The Gateway supports the Internet Protocol Security (IPSec) to secure IP traffic. IPSec
builds “virtual tunnels” between a local and remote subnet for secure communication
between two networks. This connection is commonly known as a Virtual Private Network
(VPN).
Alternatively, tunneling protocols such as L2TP and PPTP can be used to achieve a secure
connection (such as to a corporate LAN) over the Internet. These tunneling protocols can
optionally be secured themselves using IPSec.
Using the VPN menu, you can enable or disable the Gateway’s VPN settings. If the VPN
settings are enabled, you can use VPN submenus to:
y Allow PC clients behind the Gateway to access the IPSec VPN tunnel. See page 147.
y Define the VPN tunnel configuration. See page 148.
Using the VPN Menu
You can use the VPN menu to enable or disable the Gateway’s VPN functions. By default,
the Gateway’s Virtual Private Network (VPN) settings are disabled.
To access the VPN menu, click VPN in the menu bar. Figure 83 shows an example of the
menu and Table 33 describes the options you can select.