# docsis

Published articles for docsis.

This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles.

## Reverse-engineering a discarded cable modem to modify its MAC address

DevFeed: [Reverse-engineering a discarded cable modem to modify its MAC address](<https://devfeed.tech/articles/modem-cloning-for-fun-but-not-for-profit-22349.md>)

Original publisher: [Read original article](<https://yifan.lu/2017/04/02/modem-cloning-for-fun-but-not-for-profit/>)

Author: yifanlu

Published: 2017-04-02T07:00:00Z

Content type: article

Language: en

Sources: [Yifan Lu](<https://devfeed.tech/sources/yifan-lu.md>)

Topics: [Hardware](<https://devfeed.tech/topics/hardware.md>), [Reverse Engineering](<https://devfeed.tech/topics/reverse-engineering.md>), [Raspberry Pi](<https://devfeed.tech/topics/raspberry-pi.md>), [Shell](<https://devfeed.tech/topics/shell.md>)

Tags: [bpi](<https://devfeed.tech/tags/bpi.md>), [cryptography](<https://devfeed.tech/tags/cryptography.md>), [des](<https://devfeed.tech/tags/des.md>), [devices](<https://devfeed.tech/tags/devices.md>), [docsis](<https://devfeed.tech/tags/docsis.md>), [firmware](<https://devfeed.tech/tags/firmware.md>), [hacking](<https://devfeed.tech/tags/hacking.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [mips](<https://devfeed.tech/tags/mips.md>), [partition](<https://devfeed.tech/tags/partition.md>), [raspberry-pi](<https://devfeed.tech/tags/raspberry-pi.md>), [reverse-engineering](<https://devfeed.tech/tags/reverse-engineering.md>), [root](<https://devfeed.tech/tags/root.md>), [spi](<https://devfeed.tech/tags/spi.md>), [wifi](<https://devfeed.tech/tags/wifi.md>)

### AI overview

The author describes reverse-engineering a discarded cable modem that was still tied to another customer account. They accessed its UART root shell using a Raspberry Pi, dumped the flash memory, located the MAC address in an NVRAM partition, replaced it, and found that the modem still refused to establish a connection. The supplied text ends before the investigation is completed.

### Source excerpt

Recently, I stumbled upon an old cable modem sitting next to the dumpster. An neighbor just moved out and they threw away boxes of old junk. I was excited because the modem is much better than the one I currently use and has fancy features like built in 5GHz WiFi and DOCSIS 3.0 support. When I called my Internet service provider to activate it though, they told me that the modem was tied to another account likely because the neighbors did not deactivate the device before throwing it away. The technician doesn't have access to their account so I would have to either wait for it to be inactive or somehow find them and somehow convince them to help me set up the modem they threw away.