Where do I put the firmware on WNDR3400v2

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Daniel Yount
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Where do I put the firmware on WNDR3400v2

 I have logged into teh NETGEAR WNDR3400v2 router with the serial port after I bricked it when trying to edit the web server pages.  I can place the USB stick in the router and have it mounted. I have the original firware file on this USB stick I downloaded from Netgear. Where do I place it to get it to automatically replace the current firmware?

 

Daniel Yount
Daniel Yount's picture
After reading some of the de

After reading some of the de-brick routines on here I found one that worked. When it boots up it gives you an option to stop in the middle of the server startup and then the final one to get console prompt. But the one that got me to boot and start tftpd was to hold down CTRL-C then turn on the router,keep holding it for a few seconds. This dropped me to the CFE> prompt.I then typed tftpd and it said started... then on the PC I sent the tftp original firmware and it then said programmed. rebooted on its own and was back to original firmware.

Now back to hacking on the source code.

Alberto
Alberto's picture
man i got a bricked one as

man i got a bricked one as well, how do i get to the serial connection ?

i have been trying to get the TFTP working but no success yet,

will appreciate any help thanks

regards

Daniel Yount
Daniel Yount's picture
Alberto said: man i got a

Alberto said: man i got a bricked one as well, how do i get to the serial connection ? i have been trying to get the TFTP working but no success yet, will appreciate any help thanks regards

Did you make a serial 3.3v to 5.0v board to hook to your router. You have to unscrew it to get to the nice 6 pin post waiting for a max3232 chip to talk to via serial .I have a usb to serial cable, then bought the parts to make the converter. Not a complex circuit. This isrequired if you are going to do kernel work on a netgear router. 

Make sure the pinout of the circuit shown below matches the pinout of your router. Here is the data for the 3400 router v1 not v2 but the pinout is the same(its the one I used) , I need to update the v2 as its data is empty on this.

http://infodepot.wikia.com/wiki/Netgear_WNDR3400

 

Here is a link to the circuit for connecting to a serial cable.

http://www.skyuser.co.uk/forum/technical-discussion/32805-recovering-sev...

 

After building this circuit and connecting it to your computers serial port you will need to do a CTRL-C immediatly after booting up your router. the you will see a CFE> prompt. Next, at this prompt type TFTPD and enter, it should say tftp server starting and waiting ...  At this point the tftp server is running on the router LAN switch on ip 192.168.1.1 waiting for firmware to upload.

Alberto
Alberto's picture
Thanks man for the quick

Thanks man for the quick response ill follow ur guide and let u know
I have opened the router im waiting for cables tomorrow

Will update later

Thanks again