3.5.4.1 VPN Pass through Scenario
Since VPN traffic is different from that of TCP or UDP, it will be blocked by the NAT router. To support the pass-through
function for VPN connections initiated by VPN clients behind the NAT router, the router must implement some kind of VPN
pass through function for such application. The router supports the pass-through function for IPSec, PPTP, and L2TP
connections.
3.5.4.2 DMZ & Pass Through Setting
Navigate to the Basic Network > Port Forwarding > DMZ & Pass Through tab.
The DMZ host is a host that is exposed to the Internet but still within the protection of the router firewall.
3.5.4.3 Enable DMZ and Pass Through
Figure 158 – Enable DMZ and Pass-through
Item Notes Description
DMZ Mandatory field.
Default is: ALL
Check  Enable to activate the DMZ function.
Define the selected interface as the interface that packets
enter the router then fill in the IP address of the Host LAN
IP in the DMZ Host field.
Select ALL for packets coming into the router from any
interface.
Pass Through
Enable
The boxes are checked
by default
Check the box to enable the pass-through function for
IPSec, PPTP, and L2TP.
With the pass-through function enabled, the VPN hosts
behind the router still can connect to remote VPN servers.
Save Button Click the Save button to save the settings.
Undo Button Click the Undo button to cancel the settings
Table 92 – Enable DMZ and Pass-through
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