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Multiple Router Port Forwarding Guide

You might be having difficulty setting up remote connectivity to your Lorex system because you have more than one router in your local network. You might not even know that you have more than one router. For example, your home wireless router might be connected to a DSL or cable modem that was provided by your Internet Service Provider (ISP) that also functions as a router. This is a setup that is common for homes and small businesses.

Multiple router setup
Example of multiple router setup

 

This makes port forwarding slightly more complicated, as devices trying to connect to your Lorex system will have to connect through two devices, instead of one. This guide will help you determine if you have more than one router on your network, and it will help to set up port forwarding to enable connectivity to your Lorex system.

NOTE: If one of the routers in your local network is a modem/router combination provided by your ISP, you may need to contact your ISP to port forward.

 

How do I know if I have Multiple Routers?

The Lorex Easy Connect Wizard (PC only) can be used to check if you have multiple routers in your local network.

To check for multiple routers:

NOTE: Ensure your computer is connected to the same router as your Lorex system.

  1. Install the Lorex Internet Setup Wizard from the software CD included with your system or download it here.
  2. Double-click the Lorex Auto Port Forwarding (Auto Port Forwarding Icon) shortcut from your Desktop.
  3. Click the Start button.
  4. The program scans the network to detect the number of connected routers.
  5. Click the Detect Multiple Routers button (Detect Multiple Routers Button ). A list of connected routers populates in the window.
    Multiple Routers Detected Screen
    • The "Possible 1st Router" refers to the router directly connected to your Lorex system and shows the local IP address for that router.
    • The "Possible 2nd Router" refers to the router immediate to the Internet connection and shows the local IP address for that router.

 

Port Forwarding a Multiple Router Installation

If you have two or more routers in a network, you will have to configure a "DMZ (Demilitarized Zone) host" between the two routers to remotely connect to your Lorex system. This will allow one router to forward all incoming Internet traffic to the other.

DMZ port forwarding instructions

In the illustration, the router that is immediate to the Internet connection (Router 2) must identify another router (Router 1) as a DMZ host. Router 2 acts as a "bridge" between Router 1 and the Internet by passing all incoming Internet traffic to Router 1. The Auto Port Forwarding Wizard must connect to Router 1, or manual port forwarding must be configured on Router 1 to enable connectivity to the DVR system over the Internet.

These are the general steps to configure a DMZ host connection:

  1. Run the Auto Port Forwarding Wizard using the steps above to determine if you have multiple routers on your network. Note the IP addresses for "Possible 1st Router" and "Possible 2nd Router."

    NOTE: See Locating your Router IP Address for information on how to manually locate the Router's IP address.
     
  2. Open an Internet browser and log into the IP address for the "Possible 2nd Router."
  3. Locate the DMZ Host page.
  4. Enter the IP address of the "Possible 1st Router" as the DMZ Host and save your changes.
  5. Run the Auto Port Forwarding Wizard to connect to the "Possible 1st Router" and port forward the necessary ports for your Lorex system. Or, log into the "Possible 1st Router" and manually complete port forwarding.

    NOTE: See this article for details on using the Auto Port Forwarding Wizard. See this article for details on manual port forwarding.
DMZ Example Diagram

See the manual for your specific router/modem device or contact your ISP for assistance setting up a DMZ host.

 

Locating your Router IP Address - the Status Page

The "Status Page" of a router normally includes the router's vital information such as the IP address.

example router status page

 

Last Updated: 10/22/2012