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Netgear WNDR3400
Netgear WNDR3400a
N600 Wireless Dual Band Router


Netgear WNDR3400






Supported 17567


Not Supported


Not Supported


Not Supported


Not Supported

NOTE: Requires K2.6 -nv64k for DD-WRT, Do not flash anything else.



Serial Num. = not on on mine
FCC ID = PY309300116
CPU Type = Broadcom BCM4718A1KFBG CS0927 P11 927053 N1 (BCM4718A1 SoC)
MIPS Rev = ?
CPU Speed = 480Mhz (530?)
Bus = 8-bit
Flash Type = Serial
Flash Chip = MX B09423 25L6405DMI-126 36498400
Flash Size = 8MB
Max Firmware Size = 7929856 bytes or 7744 KBytes
RAM Size = 64MB
RAM Chip = Samsung 946 K4T51163QG-HCE6 CJJ355P1C
nvram Size = 64K
Switch = Broadcom BCM5325EKQMQ (BCM5325E)
Port-based vlan = ?
802.1q vlan = ?
Ethernet Port Count = 1-10/100-WAN 4-10/100-LAN
Wired Standard = IEEE 802.3/3u
boot_wait = ?
bootloader = 128kCFE
Flash Card Socket/Type = No
SD/MMC Mod Support = No
MiniPCI slots = No
PoE = No
Power = 12V/1.5A
Color of LEDs = Green/Amber/Blue
Size = 23 x 153 x 31 mm (8.8 x 6.0 x 1.2 in)
USB = 1x USB 2.0
Serial Port = Yes
JTAG Port = Yes
Supported by TJTAG/Version = Yes/WIP
Supported by dd-wrt as of = 17567
dd-wrt K2.4 Support = No
dd-wrt K2.6 Support = Yes -nv64k
Special Features = Dual-Radio

Radio (wl0)

Wireless Radio = Broadcom BCM4718A1 (SoC)
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 = 17
Radio Capabilities = ap sta wet led wme pio 802.11d 802.11h rm cqa mbss16 
                     afterburner ampdu amsdurx amsdutx acktiming 
                     rxchain_pwrsave radio_pwrsave bcm_dcs

Radio (wl1)

Wireless Radio = Broadcom BCM43224KMLG CA0942 P20 941256 4 (BCM43224)
Antenna Connector Type = Internal
Wireless Standard = IEEE 802.11a/n
WiFi Operating Frequency = 5GHz
 802.11n = up to 300Mbps
 802.11a = 6, 9, 12, 18, 24, 36, 48, 54Mbps
Radio cor_rev = 23
Radio Capabilities = ap sta wet led wme pio 802.11d 802.11h rm cqa mbss16 
                     afterburner ampdu amsdurx amsdutx acktiming 
                     rxchain_pwrsave radio_pwrsave bcm_dcs

Links of Interest


Fixme This section is in need of cleanup!

Initial flash must be with a tailed build, after which any build with -nv64k can be used.


Fixme This section is in need of cleanup!


Fixme This section is in need of cleanup!

Per Eko
There is simple way to flash original firmware.
-with router running dd-wrt, telnet in, do "mtd erase linux", wait until finished (2-3 min), then type "reboot"
-now router waits for new firmware - tftp the original .chk file (with your PC set to static IP etc)
-when tftp transfer finishes, wait 3-4 min...

JTAG/Serial Info


JTAG Pinouts


nTRST   1o o2	GND
  TDI   3o o4	GND
  TDO   5o o6	GND
  TMS   7o o8	GND
  TCK   9o o10	GND
nSRST  11o o12  N/C

Using Universal JTAG Adapter

white    1o o2	 black
  red    3o o4	 GND
 blue    5o o6	 GND
green    7o o8	 GND
yelow    9o o10  GND
orange  11o o12  N/C
JTAG Recovery
Fixme This section is in need JTAG Recovery Instructions!


Serial Pinouts

JP1 = 3.3v TTL Serial, 115200/8/N , 1 row of six pins

Serial Pinouts

GND 6 o
 TX 5 o
N/C 4 o
N/C 3 o
 RX 2 o
VCC 1 o
Hyper terminal Setup in Windows XP
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 XP
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 Recovery
Fixme This section is in need of Serial Recovery Instructions!

USB Info

The USB port is where you can connect an external USB hard drive or flash drive. Which can do a multitude of things. You can use in as a NAS, storage for a FTP server, use Optware to run external programs like torrent software, samba for sharing files to your network, share a USB printer with your network... The list of possibilities is long, it just takes a little research.

ProFTPd is included in most the newer builds of dd-wrt. Check the features chart to be sure.

A ftp server, file sharing, and a media sever is included in TomatoUSB if your device is compatable.

vlan Info


Netgear WNDR3400b Netgear WNDR3400c Netgear WNDR3400d

Netgear WNDR3400e

FCC Pictures

Netgear WNDR3400 FCC1a Netgear WNDR3400 FCC1b Netgear WNDR3400 FCC1c

Netgear WNDR3400 FCC1d Netgear WNDR3400 FCC1e Netgear WNDR3400 FCC1f

Netgear WNDR3400 FCC1g Netgear WNDR3400 FCC1h Netgear WNDR3400 FCC1i

Netgear WNDR3400 FCC1j Netgear WNDR3400 FCC1k Netgear WNDR3400 FCC1l

Netgear WNDR3400 FCC1m Netgear WNDR3400 FCC1n Netgear WNDR3400 FCC1o

Netgear WNDR3400 FCC1p Netgear WNDR3400 FCC1q Netgear WNDR3400 FCC1r

Netgear WNDR3400 FCC1s Netgear WNDR3400 FCC1t Netgear WNDR3400 FCC1u

Netgear WNDR3400 FCC1v Netgear WNDR3400 FCC1w Netgear WNDR3400 FCC1x

Netgear WNDR3400 FCC1y Netgear WNDR3400 FCC1z Netgear WNDR3400 FCC2a

Netgear WNDR3400 FCC2b Netgear WNDR3400 FCC2c


The WNDR3400 CVNA (Cablevision edition) default username and password is admin/optimum

Hardware Modification

WNDR3400v2 model will feature the BCM5358 chipset.

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