First, I could simply set a breakpoint on this conditional branch and change the register contents so that the recovery image is never loaded. July 18, at 2: After looking on traces.. Or I can buy any of your products, if you sell something. May 2, at

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Since the OS image had zyxdl modified, I first needed to figure out the checksum zyxel p-320w the firmware update file. And zyxel p-320w, I re-soldered the chip afterwards. See my previous posts for more details on the programmer that I used to read and write to the flash chip. First, I could simply set a breakpoint on this conditional branch zyxel p-320w change the zyxel p-320w contents so that the recovery image is never loaded.

The checksum field itself is set to 0xFFFFFFFF at the time of calculation, and the checksum is calculated over the entire firmware update file, except for the board ID string at the very end.


Configuration du routeur

Desoldering the flash chip and overwriting the bootloader with this patch got me past the zyxel p-320w and into the main OS:. Besides zyxel p-320w a PITA, this approach turned out to be impractical due to the following piece of earlier code:.

zyxel p-320w Hooked with logic analyser and noticed that there are signals on some pins of header and some of them correlate very zyxel p-320w with LEDs blinking. May 24, at 7: November 12, at Hi Craig, thx for a cool write-up! So i thought i gonna try what you mentioned: After looking on traces. P-32w0, James Shaw, Sure it can.

zyxel p-320w This one has two which according to Cisco RF engineer is for redundancy, but with the two built-in omni-directional 2dbi antennas,there should be of little zyxel p-320w. Luckily both were relatively easy to fix. Leave a Reply Cancel reply Your email address will not be published.

According to the datasheet, this will:. I zyxel p-320w paths from pins zyxel p-320w micro controller. So i think I have similar issue as you described.

June 4, at February 5, at 2: On ZyXEL jumper is ok. Your email address will not be published. Zyxel p-320w 5, at 9: All pins are directly connected to the chip. Or I can buy any of your products, if you sell something. Instead, I opted to simply patch the bootloader on the flash chip.

Re-enabling JTAG and Debugging the WRTN – /dev/ttyS0

July 18, at 2: What this means is that I would have to enter JTAG debug mode after the Zyxel p-320w was configured, zyxel p-320w before the reset button was checked; a race condition that was difficult to reliably to win. Recent Posts Defcon Is there any way to make a donation to support your research?

Paypal or Webmoney would be best, if you can send me the recipient details by email. Not wanting to de-solder the flash chip yet again, I zyxel p-320w to apply the patches via a zyxel p-320w update. Just connect to this pin rather than TDO pin? Hi Craig, what you are doing is p-320d, indeed.

Did you physically just remove the flash chip and if so why and how did you put the changes onto the bootloader? May 1, at That way we can possibly run a better firmware, like dd-wrt or OpenWrt.

February 21, at 1: I soldered headers on JTAG port and zyxel p-320w to connect with flyswatter and openocd. This is just a one bit change to the instruction zyxel p-320w.

Configuration du routeur pour eMule

On both routers i have 0. Thanks in no small part to copious debug strings littered throughout the zyxel p-320w and some leaked Atheros datasheetsI made good progress in statically disassembling the code. May 1, at 2: June 18, at I especially appreciate that you develop highly innovative open source software such as for example the reaver. This was easily remedied with a zyxel p-320w solder blob:.

As seen previouslythe bootloader checks the reset pin, and if asserted, it boots into a recovery image instead of booting the main image:. However, this zyxel p-320w that JTAG is likely being disabled in software.

Supported Routers

Having patched the OS, I zyxel p-320w to write it back to the flash chip. February 21, at 7: There were two solutions to this zyxel p-320w. After a reboot, lo and behold, JTAG was up and running without issues:.