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Showing posts from July, 2018

Sierra Wireless LTE Modem Guide: Automated Flashing of the EM7455/MC7455 with a Ubuntu Linux 18.04 LiveCD

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I've written a bash script to automate the entire process of setting up any of the EM/MC74XX series modems (Generic, Dell, Lenovo). This assumes you have the Sierra card inserted into a USB enclosure.

This post is part of my Sierra Wireless LTE Modem Guide Series. If you prefer to skip the blog nature of these guides and just grab the bare features and commands, my GitHub repository will serve as the authoritative source for this entire series. Any changes or updates will occur there first.
From the script description:
- Only for use on Ubuntu 18.04 LTS LiveUSB
- All Needed Packages will Auto-Install
- Sets MBIM Mode with AT Commands Access
- Changes all models of EM74XX/MC74XX Modems to the Generic Sierra Wireless VID/PID
- Clears Band Restrictions and Places Modem in LTE only mode.
- Flashes the Current Generic Firmware as of 2018-07-18

Link to script:
https://github.com/danielewood/sierra-wireless-modems/blob/master/autoflash-7455.sh

If you are feeling brave you can run the scr…

Sierra Wireless LTE Modem Guide: Adapters and Antennas

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So you took my advice about which modem to buy and settled on either the EM7455 or the EM7565. Now you need a way to connect that modem to a USB port for use on your desktop or router.



This post is part of my Sierra Wireless LTE Modem Guide Series. If you prefer to skip the blog nature of these guides and just grab the bare features and commands, my GitHub repository will serve as the authoritative source for this entire series. Any changes or updates will occur there first.

My preferred enclosure is the M.2 B-Key to USB 2.0 Adapter With SIM Slot from eBay that costs a mere $22 shipped from China. If you are in a bit of a hurry, order it from LTEFix.com. Jim operates on pretty low overhead, so his prices are very reasonable if you need it next week instead of in three weeks. This enclosure and any EM series modem are all you need to get started. The package includes everything else. On the downside, it is only USB 2.0 and the included USB cable will not work very well if you are far …

Sierra Wireless LTE Modem Guide: Additional References

This section of the guide is more of a dumping ground of miscellaneous links and snippets that I am using as part of an ongoing process of documenting the Sierra Wireless series. It is for my reference, as well as useful to see things I am working on and doing your own research.

Note: This post is part of my Sierra Wireless LTE Modem Guide Series. My GitHub repository will serve as the authoritative source for this entire series and any changes or updates will occur there first.


Must tape over USB3 pins on MC74XX:https://techship.com/faq/sierra-wireless-mc74-series-module-is-not-detected-by-the-operating-system/Sierra Wireless MC7455 | EM7455 -- AT! Command Guidehttps://ltehacks.com/viewtopic.php?t=33Routers Supported by ROOterhttps://www.ofmodemsandmen.com/routers.htmlBPlus USB 3.0 Enclosure for M2 B Key with SIMhttp://www.hwtools.net/Adapter/USB3M2%20Series.html#Web-shop-ROOter development threadhttp://forums.whirlpool.net.au/archive/2689577Zukota on enabling COM portshttps://zukota…

Sierra Wireless LTE Modem Guide: Series Index

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The Sierra Wireless LTE Modem series is a very popular choice among those wanting the maximum performance out of their LTE cellular service. The modems are extremely affordable on the second-hand market, cover a wide range of frequencies, and are all factory unlocked. You can buy just about any second-hand Dell branded EM7455, plug it in, and go. Unfortunately there is a bit of a learning curve that goes along with them, but this guide will hopefully serve to make that a short and simple process, rather than a week long process of investigation a researching.

This post is part of my Sierra Wireless LTE Modem Guide Series. If you prefer to skip the blog nature of these guides and just grab the bare features and commands, my GitHub repository will serve as the authoritative source for this entire series. Any changes or updates will occur there first.

In this series, we’ll cover the following topics:
(GitHub links mean that the blog entry is not yet complete)
 - Modem Performance/Specifi…

On-the-fly Dynamic DNS Doctoring (Rewrite) for a 1-to-1 NAT using PowerDNS Recursor

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The Problem Corporate mergers and IP address scheme reallocation can be a major pain point, especially when you have legacy systems that cannot have their network settings modified. One solution is to preserve the legacy network and use a 1:1 NAT to remap the entire network to a new IP space. While this solution resolves IP conflicts, it causes problems when you still need to route traffic to that subnet from systems outside of that network. The responses from the DNS servers on the re-mapped network are responding with the original set of IP addresses and so your traffic will end up going to the wrong destination. 
Bad Solutions The most common solution is to maintain a hosts file or setup a stub zone that you manually maintain. The downside of this is that it is a lot of work. The other downside of this is that you now have multiple locations in which to maintain DNS updates and it will break anything that relies on dynamic DNS updates. The end result of this is all the headaches o…