Motorola 4100 cable modem hack

Providers put capacity limits in their subscriber's modems to prevent each user from taking more than their fair share of the bandwidth available on each node. In other words, if a user uncaps his or her modem and starts hogging bandwidth during peak hours, neighbors will suffer reduced performance.

Uncapping sometimes robs Peter to pay Paul. Instructions for pulling off the configuration file hack have been on the Web for at least a year, and chat rooms and Web boards are crowded with uncappers trading tips and experiences. Dedicated hobbyists have refined the procedure and written tools to automate key portions of it, but pitfalls and caveats abound. Search In. Motorola Surfboard Firmware Upgrade. Share More sharing options Followers 0. Recommended Posts.

Posted April 3, At this point the easiest route to take is to leave the modem on for a few hours then check back to see if your config list has been updated. Often config names are quite If the config file names you have are not easy to understand you may have to try a few.

If you find a config you want to try simply go back to the hack page and enter the name of the config you want to load and save the change. For the second value put a address considerably higher but no to much higher. Play around with this application to find a range that will best suit you. After the info has been entered use the mass get function to retrieve the config names. Put one of the addresses from each config into the step 1 program to find out which config is the fastest in many cases this is not necessary however because the configs are named like BANNED.

If the configs do not list you will need to retrieve your current config an explanation for this can be found in the archive this was distributed in. After you have retrieved the config open it with Config Edit and locate your community string. After you have found the config names. You can set you modem to download it when it boots using the config boot command.

If your isp uses dynamic configs each modem gets a unique config you will need to use the following oids Download: 1. This is not difficult and there are many 3rd party programs that can help you with this. Refer to the firmware command list for all functions. Use your HFC ip address.

Leave community string alone for firmware server enter your public ip address. For firmware file select the correct update file for your modem this will be a If the update will not go through it is because of 1 of 2 things either your firmware version is higher than SB Follow the config file retrival tutorial and open the config.

Once this is done run the firmware update. If this method still does not work because you have a high firmware version like 4. Once the new firmware is loaded on the modem you will need to tell your modem to boot a faster config file.

Find the MAC Address of your cable modem this is usually found on a sticker on the cable modem or in the documentation which came with it.

Open the DHCP force application put the modem's mac address and use the discover function. Then write down the values that are provided in the boxes. This can be found under the DHCP menu. Once media sense is disabled you will most likely have to restart your computer.

This time after the discover finishes change the config The easiest way to do this is to unplug it and then plug it back in. Do not reboot your modem again however because this will set your modem back to its original settings. If all went well you should be on at a faster speed now. You can contact us at admin theoryshare. Hackware firmware written by Kuyza. Total views 12, On Slideshare 0. From embeds 0. Number of embeds 9. Security researcher David Longenecker discovered a loophole that made these modems vulnerable to unauthenticated reboot attacks.

He also released his "exploit" after Arris formerly Motorola stopped responding to him despite a responsible disclosure.

Arris does not provide any password authentication set up on the modem's user interface, thus allowing any local attacker to access the administration web interface at This is nothing but a Denial of Service DoS attack.

By clicking 'Restart Cable Modem' manually will disable victim's modem for 2 to 3 minutes and every device on that network will lose access to the Internet.