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Netgear WNR834B v2.0
Netgear WNR834Ba
RangeMax Wireless-N Router








Netgear WNR834B v2.0


Netgear WNR834B


Not Supported


Not Supported


Not Supported

NOTE: During configuration or flashing a device, the only that should be hooked to the device is the computer and power.


Fixme This section is in need of cleanup!


Serial Num. = ?
Board ID = U12H081 rev 3 gp 800063
FCC ID = PY307100061
CPU Type = Broadcom BCM4704KPBG CA0706 P12 812404 P2 (BCM4704)
MIPS Rev = ?
CPU Speed = 264MHz
Bus = ?
Flash Type = Parallel
Flash Chip = MX29LV320CBTC-90G
Flash Size = 4MB
Max Firmware Size = ?
RAM Size = 16MB
RAM Chip = 2 x samsung K4S641632K-UC75
Switch = Broadcom BCM5325FKQMG RD0635 P11 790651 5A (BCM5325F)
Port-based vlan = ?
802.1q vlan = ?
Ethernet Port Count = 1-WAN 4-LAN
Wired Standard = IEEE 802.3?
boot_wait = ?
bootloader = ?
Flash Card Socket/Type = No
SD/MMC Mod Support = No
MiniPCI slots = No
PoE = No
Power = 12V/1.0A
Color of LEDs = ?
Size = ?
USB = No
Serial Port = Yes
JTAG Port = Yes
Supported by TJTAG/Version = ?
Supported by dd-wrt as of = 3rd July 2008
dd-wrt K2.4 Support = Yes
dd-wrt K2.6 Support = No
Special Features = ?

Radio (wl0)

Wireless Radio = Broadcom BCM4321LKFBG HS0623 P11 785070 N1 (BCM4321)
Antenna Connector Type = Internal
Wireless Standard = IEEE 802.11b/g/n
WiFi Operating Frequency = 2.4GHz
 802.11n = up to 300Mbps
 802.11g = 6, 9, 12, 18, 24, 36, 48, 54Mbps
 802.11b = 1, 2, 5.5, 11Mbps
Radio cor_rev = 11
Radio Capabilities = ?

Links of InterestEdit


(See Important Notes below before attempting to flash)


Do not use bin/chk files from the router database older than svn12188. Currently, they are bricking routers. Once this problem is sorted out, this message will be removed. Also you might want a build higher than 12533 because the root-exploit (milw0rm) on older versions.
Sparkie Updated by redhawk0

This file worked perfectly with my router:

This file bricked my router, while earlier versions seem to work:

  • dd-wrt.v24-13577_NEWD_openvpn_jffs_small.bin - deadlyninja
    • This router does not have VLAN support, similar to the WRT610N.**

The Netgear WNR834Bv2 is now fully supported as of 3rd July 2008. Thanks to Eko, Brainslayer, etc. for their superb work in getting this router supported.

These (slightly modified) instructions were first posted by sparkie here. Read that complete thread for the hairy details on getting this device fully supported, if you are so interested or suffer from insomnia.

Step 1: Download the mini version of DD-WRT version 24, build 12548, new driver in the dot CHK format here.

Step 2: Flash the firmware to your router using Netgear's factory firmware standard web interface. Note that to successfully flash this device, you may need to use IE or Firefox 3 or higher. sparkie has reported in the thread linked above that Firefox 2 will not work with the Netgear factory web upgrade page to flash this device.

Step 3: If the mini build is insufficient for your needs, you may download your preferred flash BIN file from here. Then flash up the new .BIN file using the DD-WRT web interface from the Administration tab, then the Firmware Upgrades tab.

Important Notes (Please read these in full before attempting to flash):

  • DO NOT ATTEMPT TO FLASH ANY BUILDS EARLIER THAN 9856 DATED 3RD JULY 2008, or you risk bricking your router. Some of the v24 release candidate 7s worked with minor bugs. But the first final v24 bricked the router for some users as a result of a problem with JFFS.
  • TFTP flashing only works when the router detects a bad flash and puts itself in diagnostic mode. This can be seen by a flashing green power light, and also a ping trace will show response immediately after powerup with TTL=100. Proper flashes will stop replying to pings after about 15 seconds, then will reply with TTL=64. Diag mode will stay at TTL=100. Diag mode can be forced by opening the router and shorting pins 16 and 17 on the MX flash chip during powerup. Some suggest you try the pin short first, other suggest JTAG. Both have their pros and cons.
  • TTL=100 3~6 times means your router is bricked. No amount of uploading an image via tftp at the proper time will work. It will require a pin short, or jtag to fix. It is futile to try and achieve perfect timing to upload an image in this mode.
  • NEWD = New Drivers; VINT = Vintage Drivers. Use only NEWD firmwares with this router. VINT builds are for much older routers.
  • DO NOT INSTALL the generic broadcom dd-wrt.v24_std_generic.bin file (2.4 SP1). It will likely brick your router.
  • If your router is stuck in 'tftp only' mode (characterized by a constant TTL=100 ping response), you can rescue it by TFTPing the original Netgear firmware less the header file located here, which will flash your router back to Netgear's stock 1.0.22 North America firmware. This file is called wnr834bv2_1_0_22_na.bin
  • For routers will a more recent flash, you will need the 2.1.13 version of the flashes 2.1.13_NA / 2.1.13_WW
  • Your router has only 4 MB of Flash RAM. Do not attempt to flash the MEGA version of DD-WRT to this device.

DOUBLE SUPER DUPER Extremely Important Note:

According to Eko, the NVRAM of this router has an additional partition on it which contains your router's serial number, MAC address, and board code. DD-WRT builds prior to 9856 would overwrite this section of NVRAM, if the user enabled JFFS. Builds 9856 and higher include support for turning JFFS on with this model router. In the event that you accidentally erase this part of the NVRAM, you can only recover your router by flashing it via JTAG.

This also implies that if you want to use the OpenVPN version, you'll want one with an openvpn_jffs_small suffix like THIS one (current as of 15/5/2009).


If dd-wrt is already on the router follow these instructions. If stock firmware is on the router follow the flashing instructions.

  1. Check for recommended builds here first.
  2. Set your computer to a static IP of (or to whatever subnet the router is on) Disable all firewalls and security. Disable wireless on your computer and only have the router connected to the flashing computer by the ethernet cable between the two.
  3. Hard reset or 30/30/30 (If the router supports it, if not, reset to defults in the GUI) prior to flashing. Wait. Check for password page on re-login and change password.
  4. Flash firmware. You can use the webgui except if you have a belkin router. (For belkin use tftp.exe to flash)
  5. least three minutes. Lights should return to normal. See important2, below. Failing to wait is how most people brick their routers.
  6. Do a power cycle of the router. (Unplug the cord, count to 30 and plug it back in.)
  7. Wait for the lights to return to normal usually about 2 minutes.
  8. Hard reset or 30/30/30 again (If the router supports it, if not, reset to defults in the GUI). Wait. Check for the password page and re-login to change the password. Then you can reconfigure your settings manually.
  9. Once configured set your computer back to autoIP and autoDNS.

Important1: This Hard reset or 30/30/30 works fine for Asus router, but you do have to power cycle after the reset.

Important2: After you flash the firmware, and before you do the hard reset, the router will be building some nvram settings. YOU MUST WAIT FOR THIS TO FINISH PRIOR TO DOING ANYTHING WITH THE ROUTER INCLUDING A HARD RESET. Usually, you can tell when this process is completed by the WAN light coming on, but it does take several minutes. Go have a beer. There are starting to be more and more people who BRICK their routers by not waiting until the nvram is rebuilt, PRIOR to doing a hard reset. YOU NEED TO WAIT!


Fixme This section is in need of cleanup!

JTAG/Serial InfoEdit


JTAG PinoutsEdit
J12 Pin 1 connected to JP1 pin 1 via 100 ohm resistor. 

J12 Pin 3 --100r--> TDI (Pin 2 of parallel port) 
J12 Pin 5 --100r--> to TD0 (Pin 13 of parallel port) 
J12 Pin 7 --100r--> to TMS (Pin 4 of parallel port) 
J12 Pin 9 --100r--> to TCK (Pin 3 of parallel port) 
J12 Pin 10 -------> to GND (Pin 20&25 of parallel port)

  • Functional NVRAM backup is here.
  • Functional CFE backup is here.
  • Functional Custom backup is here. (REQUIRES MODIFICATION OF MAC ADDRESS)
  • Tornado's JTAG v2.1.4 is here.
JTAG RecoveryEdit

One of the best threads that has been found for debricking the WNR834Bv2.

The fastest way to recover a bricked WNR834Bv2 is to wipe the kernel portion of the flash, and reflash the custom section.

  • 1. Download one of the binpacks WNR834Bv2 World Wide. WNR834Bv2 North America, and the custom.bin
  • 2. JTAG the router
  • 3. Erase the kernel portion of the flash
  • 4. Reflash the 'custom' section of the flash (hex edit the custom.bin and put your own MAC address in at offset 40~45!)
  • 4a. flash parameters: -flash:custom /window:1fc00000 /start:1ffe0000 /length:10000
  • 5. Power cycle the router and the router will respond with a constant ttl=100 ping response
  • 6. TFTP a dot CHK file appropriate to your router (NA or WW)
  • 6a. You will know that the transfer was completed and the flash process is working when router power light blinks amber on and off once per second. After a few minutes, the router will begin to respond with a ttl=64 ping and will be functional again.


  • Pin Locations.
  • Short pins 16 & 17
  • Power up router
  • Open two command prompt/console windows
  • Start a ping of the router, it should respond with TTL=100
  • Initiate TFTP upload of a .chk file (DD-WRT or one of the stock Netgear ones)
  • Immediately remove the short
  • You will know that the transfer was completed and the flash process is working when router power light blinks amber on and off once per second. After a few minutes, the router will begin to respond with a ttl=64 ping and will be functional again. (Yes, it actually does take 2~3 minutes)


Serial PinoutsEdit
Fixme This section is in need of cleanup!
Hyper terminal Setup in Windows XPEdit
In Windows XP, Click Start Button - All Programs - Accessories - 
   Communication - HyperTerminal
Enter a name for the connection, Click ok
Choose com port you adapter is plugged into, Click ok
 Bits per second = 115200
 Data Bits = 8
 Parity = none
 Stop bits = 1
 Flow control = none
Click ok
Click File - Save As, and select a place to save it to so you 
             don't have to enter the settings again.
Putty Setup in Windows XPEdit
After installing putty, run it
 Serial line = The COM port your using for serial (ie. COM3)
 Speed = 115200
Click on Serial under Connection
 Serial line to connect to = same as above (Serial line)
 Speed (baud) = 115200
 Data bits = 8
 Stop bits = 1
 Parity = None
 Flow control = None
Click Session
 Enter a name for your connection under saved sessions
Click Save
Click Open
Serial RecoveryEdit
Fixme This section is in need of Serial Recovery Instructions!

vlan InfoEdit

Fixme This section is in need of cleanup!


Netgear WNR834Bb

FCC PicturesEdit

Netgear WNR834B v2.0 FCCa Netgear WNR834B v2.0 FCCb Netgear WNR834B v2.0 FCCc

Netgear WNR834B v2.0 FCCd Netgear WNR834B v2.0 FCCe Netgear WNR834B v2.0 FCCf

Netgear WNR834B v2.0 FCCg Netgear WNR834B v2.0 FCCh Netgear WNR834B v2.0 FCCi

Netgear WNR834B v2.0 FCCj Netgear WNR834B v2.0 FCCk Netgear WNR834B v2.0 FCCl

Netgear WNR834B v2.0 FCCm Netgear WNR834B v2.0 FCCn Netgear WNR834B v2.0 FCCo

Netgear WNR834B v2.0 FCCp Netgear WNR834B v2.0 FCCq Netgear WNR834B v2.0 FCCr

Netgear WNR834B v2.0 FCCs Netgear WNR834B v2.0 FCCt Netgear WNR834B v2.0 FCCu

Netgear WNR834B v2.0 FCCv Netgear WNR834B v2.0 FCCw Netgear WNR834B v2.0 FCCx



Many of the factory refurb WNR834B v1 and v2 routers sold in 2008 through,,, and were shipped with a marginal or defective power supply manufactured by DVE. These units are smaller than traditional power supplies, and can be identified by the following information:

P/N: 332-10006-01

MODEL: DSA-12R-12 AUS 120120

The routers will operate perfectly with only 9VDC @ 800mA, but older-style surplus Netgear power supplies that output 12VDC @ 1A are available from as DCTX-1216

Hardware ModificationEdit

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