Netgear Firmware Recovery Utility - NETGEAR WNDR3300 Manual

1. SSH or telnet into the router CLI
2. Enter this at the shell prompt (deletes the OS causing the router to go in to recovery mode after
reboot):
♦ "erase linux" (`mtd erase linux` is not recommended, as it leaves the device in TFTP mode
[buddee])
3. This will show a message similar to:
♦ Unlocking linux ...
Erasing linux ...
4. Wait to be returned back to the shell prompt, then power cycle the router
5. Ping 192.168.1.1: a TTL=100 indicates TFTP recovery mode
6. TFTP an appropriate .chk file to the router
♦ Upload either an original Netgear firmware OR a known working DD-WRT .chk file for this
router

Netgear Firmware Recovery Utility

If flashing the router with tftp is unsuccessful, and you have a flashing power light with a ping response of
TTL=100, the unit may still be recoverable using the Netgear Firmware Recovery Utility.
• This utility may be used in other circumstances, but I have only tested it under the above conditions.
1. Do a 30/30/30 reset.
2. Set a static IP for your computer's NIC, i.e. IP 192.168.1.2, gateway 192.168.1.1
3. Connect your computer to the router with a network cable.
4. Verify power light on the router is flashing slowly.
5. Open a command prompt and ping 192.168.1.1. You should receive a response of TTL=100.
6. Start the Autorun.exe application in this download from Netgear's site:
ftp://downloads.netgear.com/files/WNDR3300_230-10591-04v2.3.zip
7. Select the "Support Software" option, then "Firmware Recovery Utility" to launch the recovery
application.
8. Follow the prompts while the utility is running. Be patient, the utility takes a long time to run. Your
network adapter will appear to be disconnected during part of the process.
9. Your router should now be working again after the utility is finished running.
10. Follow the instructions under "Flashing WNDR3300" to flash 3rd party firmware again.
• This is discussed in this thread: WNDR3300 specific K26 k2.6
JTAG / Serial information
1. Does this router support JTAG?
• No: the mounted pin header on the PCB is for the dome LEDs. Do not use this for JTAG or serial
TTL.
• If there is another header mounted to the right of the dome LED header, it is for the serial TTL
console.
Revert to Netgear firmware
Netgear_WNDR3300
5