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(Hopefully) How to unbrick an old Netgear switch

 So, this project has not started yet. It will eventually, because it's not actually my switch, it's a friend's. But Netgear haven't told me where the JTAG or UART interfaces are, so maybe after an hour of oscilloscope probing I will be able to gain access to the CFE  (kinda like the BIOS of the switch) after finding UART, which I can then (in theory) use to reinstall a rolled-back firmware or the latest full update. I'm sure he could do it, but I could do it quicker (he softwares to software, I software almost exclusively in Assembly on hardware I make and for the purposes of hacking stuff). Get the hardware hacker in, not the networking guy :) Anyways I'm sure we will post some updates and pictures of this here once we get started with it.

Later on December 26: 

Doing some research into the CFE, apparently there is (on some models) hidden UART headers. Lovely to know that there may be lethal voltages inside a seemingly innocent blue box... I'm sure its just a warning about 240V from the power supply (I hope so, anyways) 








73 for now

Daniel

This post is licensed under CC BY 4.0 by the author.