User's Manual

Virtual Private Networking
101
N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700
Note: While your PC is connected to a remote LAN through a VPN, you
might not have normal Internet access. If this is the case, you have
to close the VPN connection to have normal Internet access.
Set Up a Gateway-to-Gateway VPN Configuration
Note: This section describes how to use the VPN Wizard to set up the
VPN tunnel using the VPNC default parameters listed in
Table 16 on
page 89. If you have special requirements not covered by these
VPNC-recommended parameters, see Set Up VPN Tunnels in
Special Circumstances on page 11
1 for information about how to set
up the VPN tunnel.
Follow this procedure to configure a gateway-to-gateway VPN tunnel using the VPN Wizard.
VPN tunnel
Internet
IP: 192.168.0.1 IP:192.168.3.1
Gateway B
Gateway A
22.23.24.25
14.15.16.17
Figure 45. Gateway-to-gateway VPN tunnel
Set the LAN IPs on each wireless modem router to different subnets and configure each
correctly for the Internet. The subsequent examples assume the settings shown in the
following table.
Table 18. Gateway-to-gateway VPN tunnel configuration worksheet
Parameter Value to Be Entered Field Selection
Connection Name GtoGr N/A
Pre-Shared Key 12345678 N/A
Secure Association N/A Main Mode Manual Keys
Perfect Forward Secrecy N/A Enabled Disabled
Encryption Protocol N/A DES 3DES