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Series 3: How to Configure IP Passthrough on a capable Cradlepoint router

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Series 3: How to Configure IP Passthrough on a capable Cradlepoint router

Products Supported: All Series 3 devices except the MBR95, MBR1200B, and IBR350 . Click here to identify your router.

Firmware Version: 5.4.1 - for information on upgrading firmware, click here.

Firmware version 6.0 has been released and introduces a vastly improved GUI for all current Series 3 routers.  Cradlepoint has created new Knowledge Base articles with updated screen shots and instructions for the new GUI layout.  As a result, this article has received its final update.  To view the version of this Knowledge Base article for Firmware 6.0 and Later please click here 


Quick Links

Summary

Configuration

Troubleshooting

Related Articles


Summary

This article describes how to configure IP Passthrough (Bridge Mode) on a capable Series 3 CradlePoint router.


Configuration

Configuration Difficulty: Novice

Things to know before getting started: - When IP Passthrough is enabled, the first device connected to the router receives the modems public IP address. This means that any OTHER devices connected to the router will not be able to access the internet.

There are two ways to configure IP Passthrough.

  • Step 1: Log into the router's Setup Page. For help with logging in please click here.
  • Step 2.1: The first is to use the IP Passthrough Setup wizard available under the Getting Started tab. This wizard will automatically apply the settings for IP passthrough.

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  • Step 2.2: The second is to configure it manually. Click the Network Settings tab then select Wi-Fi/Local Networks.

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  • Step 3: Locate Primary LAN, put a check mark next to it then click Edit.
  • Step 4: (This step only necessary on the MBR1400, IBR600, and CBR400) In the new window click on the Interfaces tab. In the Selected box, click on the WiFi network and click the minus button.

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  • Step 5: Then click the IPv4 Settings tab and change the Routing Mode to IP Passthrough.

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  • Step 6: Click Submit.
  • Step 7: Verify that the Internet is still available on the connected computer.
  • Step 8: Verify that the IP address is same as the modems IP.

Troubleshooting

  • If the settings saved correctly and the connected computer is works properly but after connecting the router to a different device it does not work as expected, consider the following:

    • Often, IP Passthrough requires a MAC address bound to it in order to work properly. To do this, return to the screen presented on step 4 then re-perform step 5. In the Passthrough reservation field type the IP address of the device that you want to configure IP Passthrough for.
    • Then click Submit.
  • If IP Passthrough works (device behind router receives the modems IP address) but you are unable to open ports, consider the following:

    • Many 4g networks assign private, double-NAT'd private IP addresses Often these IP addresses start with 10.x.x.x. If you have this type of IP address, no port forwarding or remote access will be possible due to the cellular carrier's network configuration. This is not a limitation imposed by the CradlePoint router.
    • In Passthrough mode the router is not performing any routing so it is very likely that the cellular carrier is blocking ports.
    • If the CradlePoint router is unable to acquire a connection through the modem it will automatically issue your device a DHCP IP address. This can also occur if the router detects the computer connected BEFORE it connects to the modem. Performing an IP refresh/renew on your device will typically resolve this error.

Related Articles/Links


Published Date: 06/03/2016

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