I walked away from this, but came back to it today. Still couldn't get nmrpflash or TFTP64 to work. I also tried the built-in Windows TFTP command line, but was never able to connect to the router. All of the posts say to be patient and keep trying, but I must have done it 30 times.
The solution came from this post and this post. I had to manually upload the firmware with scp, then SSH in to write it.
Here's the full procedure for anyone else who runs into the same issues.
- Reset OpenWRT so that there's no password on the root user.
- Follow steps 1 through 5.d in Netgear's How do I upload firmware to my NETGEAR router using TFTP from the Microsoft Windows Command Prompt? webpage.
- I also recommend renaming the firmware to be
wax202.img
- I also recommend renaming the firmware to be
- Instead of using
tftpto put the file on the router, use thescpcommand to upload to thetmpfolder.scp wax202.img root@192.168.1.1:/tmp
Windows might display a warning that looks like this:
The authenticity of host '192.168.1.1 (192.168.1.1)' can't be established.
ED****5 key fingerprint is ***********************.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])?
If so, type yes and Enter to continue.
Warning: Permanently added '192.168.1.1' (ED****5) to the list of known hosts.
WAX202.img 100% 22MB 5.4MB/s 00:04
- Close the command prompt window.
- SSH into the router using a client such as PuTTY
- Host name:
192.168.1.1 - Port:
22
- Host name:
- Change to the
tmpdirectory and write the firmware.cd /tmpmtd write wax202.img firmware # mtd3 is 'firmware'
- Unplug and plug the router to reboot.
It will take a few minutes to install the stock firmware. I expected the router to revert to factory settings, but it retained the last settings I had before flashing OpenWRT onto it.
Good grief.