More Novatel MiFi Hacking: Exceeding the 5 connection limit

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Novatel MiFi 2372After testing several different methods, I finally managed to get around the 5-client restriction on the Novatel MiFi 2372 I recently purchased from Amazon.

First, some background information:

The Novatel 2372 I purchased had “some minor issues“, and I was looking for a way to get at the firmware, or updated versions of the firmware, so I could address and hopefully fix these. I was more than happy to start rolling my own firmware, to put onto the device if necessary.

If you search the Interweb, there are hundreds of posts, blogs and webpages out there on how to tweak the MiFi device by making changes to the exported config.xml file and re-import it. Some of these work, some (even after making the changes), do not. One of them is the hard-coded limit on incoming device (client) connections on the MiFi itself… this is hard-locked at 5 connections, no matter how you modify the config.xml to support more.

You can however, update the number of DHCP addresses the DHCP server on the MiFi will give out, just not the number of incoming connections to the MiFi.

But I figured out a better way to solve this in a very clean and elegant way. Unfortunately, it involves a second router… but one with a LOT more functionality. This can probably be reproduced by a smaller router, but I used what I already had in my personal lab to create this working proof of concept.

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