Configuring DMZ on your Linksys Gigabit VPN Router, LRT2x4

The Demilitarized Zone (DMZ) port of your Linksys Gigabit VPN Router, LRT2x4 can separate publicly accessible servers and be replaced by an independent network.  When DMZ server is attacked, it ensures that public access cannot contact other internal network service.
Usually, the security level of external network is lower than the internal network.  To keep internal network security, the external network is usually not allowed to be directly connected to the internal network.  Thus it is recommended to put the servers of external services in the DMZ network such as DNS, WEB, FTP server, etc.  With this setup, even if the DMZ servers are hacked, it will be able to keep the internal network security.
The servers in the DMZ network have things in common:
  1. There is no confidential information in the servers.
  2. Even if the servers are hacked or virus infected, the internal network will not be affected.
The DMZ of the LRT has two (2) modes, Subnet and Range (DMZ and WAN within same subnet). 
Follow the instructions below on how to configure a DMZ on the LRT214 or LRT224 router.
Step 1:
On your web browser, access your Linksys Gigabit VPN router’s web-based setup page.  For instructions, click here.
Step 2:
Click Configuration.
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Step 3:
Click Setup > Network.
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Step 4:
Under the WAN SETTING section, click the Edit button next to the WAN1 interface. 
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Step 5:
Configure the WAN1 CONNECTION setting then click Save.
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Step 6:
Under the DMZ SETTING section of the Network page, click the Enable DMZ checkbox.  Click the Edit button next to the DMZ interface.
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Step 7:
Enter the DMZ connection settings in the provided fields then click Save.
  • For Range mode, enter the IP address range that your Internet Service Provider (ISP) provided in the IP Range for DMZ port fields. 
Range mode configuration example:
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Range mode network architecture example:

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  • For Subnet mode, enter the IP address and subnet mask.
Subnet mode configuration example:
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Subnet mode network architecture example:
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