Netgear WNDR3400

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Revision as of 00:50, 6 February 2014 by LOM (Talk | contribs)
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Important Notes

Only version 1 is supported. Versions 2 & 3 are not yet supported.

This router only uses K26 builds. Use builds with K2.6 in the name.

Read the Peacock announcement (at the top of the Broadcom Forum). Read it all. Carefully.

Hardware Specs

CPU Broadcom BCM4718A1
CPU Speed 480 MHz
Flash ROM 8 MB
Radios 2.4 GHz and 5 GHz
WLAN Support a/b/g/n
WLAN Max Speed 300 mbps on 2.4Ghz and 300mbps on 5Ghz
Antenna Location Internal
Switch 4x 100 + 1 100 WAN
USB 1x USB 2.0

DD-WRT Installation

  1. There are two versions of this router with corresponding initial flash mini firmware. One is for Netgear branded routers and the other is for Cablevision routers.
  2. Do a factory reset (with the button on the back), and upgrade with the appropriate mini firmware above. If it complains about downgrading, just Allow.
  3. To gain functionality of the usb port, upgrade to the big version or the mega version after flashing the mini version above.
  4. 30-30-30 reset router

Build Notes


  • This is a good build for this router.


  • Upgrading to 21676 Big will brick this router! Use 21676 Mega instead.
  • This is otherwise a very good build for this router.

Revert to Factory Firmware

  1. Download official Netgear firmware
  2. Factory Reset DD-WRT (with the button on the back)
  3. Enable telnet under services
  4. Telnet to router (
  5. Issue the command "mtd erase linux" & wait ~3 mins
  6. tftp the official firmware to the router
    • tftp for windows [1] enter router ip, leave password blank, select official firmware file
  7. 30-30-30 reset router