VPN Configuration
151
N600 Wireless Dual Band Gigabit VDSL2 Modem Router DGND3800B
b. Type ping 172.23.9.
If the pings fail the first time, try the pings a second time.
Modem Router with FQDN to Gateway B
This section is a case study on how to configure a VPN tunnel from your modem router to a
gateway using a fully qualified domain name (FQDN) to resolve the public address of one or
both routers. This case study follows the VPN Consortium interoperability profile guidelines
(found at http://www.vpnc.org/InteropProfiles/Interop-01.html).
Configuration Profile
The configuration in this section follows the addressing and configuration mechanics defined
by the VPN Consortium. Gather the necessary information before you begin configuration.
Verify that the firmware is up to date, and that you have all the addresses and parameters to
be set on both sides. Check that there are no firewall restrictions.
Gateway A
WAN IP
Internet
10.506.0/24
(DGND3700)
LAN IP
10.5.6.1
example.org
WAN IP
example2.org
Gateway B
LAN IP
172.23.9.1
172.23.9.0/24
(FQDN)
(FQDN)
Figure 24. VPNC example, network interface addressing
Table 13. Wireless modem router with FQDN to Gateway B profile summary
VPN Consortium Scenario Scenario 1
Type of VPN LAN-to-LAN or gateway-to-gateway (not client-to-gateway)
Security scheme: IKE with pre-shared secret/key (not certificate based)
IP addressing:
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