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Netgear Wndr4000 Driver Download

  • 3Installing SSH Daemon while keeping original Firmware
  • 5OpenWRT Toolchain
  • 7Compiling Brn
  • 8Compiling Services for Brn
  • 11Install to Flash
    • 11.2Via CFE
  1. Netgear N600 Wndr3400v2 Firmware Update
  2. Netgear Wndr4000 Driver Download Windows 7
  3. Driver Game Download
  4. Driver Downloads For Windows 7
  5. Netgear Wndr4000 Firmware
  6. Netgear Wndr4000 Driver Downloads
  • Re: WNDR4000 'Choking' Bandwidth? BTW, you say your upload speed is 768 kbps. That would indicate a download speed of approx. 6 Mbps like you report and not 15 Mbps as 'promised':confused:. Normally upload speed is about 10% of download speed., but in your case a different ratio may be used.
  • OpenWRT is a Linux port (2.4 kernel) for embedded plattforms including the Netgear wgt634u wireless router. Click is a modular software for implementing advanced router functionality on Linux systems. Madwifi is a WLAN driver (802.11 wireless network) that runs on OpenWRT and can be integrated with the click system.
  • ReadySHARE USB Storage Access allows users to access an external hard drive connected to your router's USB port. Users will be able to share content to any P.

Abstract

OpenWRT is a Linux port (2.4 kernel) for embedded plattforms including the Netgear wgt634u wireless router.

Click is a modular software for implementing advanced router functionality on Linux systems.

Madwifi is a WLAN driver (802.11 wireless network) that runs on OpenWRT and can be integrated with the click system.

N750 Wireless Dual Band. Gigabit Router WNDR4000. 350 East Plumeria Drive. San Jose, CA 95134. March 2011 202-10781-03 v1.0.

This tutorial describes the steps of downloading the source code for each of these3 components, for compiling them, and for getting them to run (together) on a wgt634 Netgear wireless router platform.

This work has been done for the Berlin Roof Net project ( http://sarwiki.informatik.hu-berlin.de/wiki/BerlinRoofNet ),with substantial support from the MIT Roof Net project team ( http://pdos.csail.mit.edu/click/ )


Introduction

The Netgear wgt634u Wireless Router has a Broadcom (type 0x29007) CPU, running at 200MHz. This CPU is not compatible with the Pentium (or similar) on your desktop computer, i.e. you can not simply take a binary program file from your desktop and execute it on the Netgear router - the Broadcom CPU encodes instructions and data in a completely different way and would therefore not 'understand' your Pentium-based program at all.

alternate devices can be found at: http://wiki.openwrt.org/OpenWrtDocs/Hardware/

The operating system on the Router router is Linux - again, not the same Linux that you might run on your desktop, but a Linux that was specifically compiled for the Broadcom CPU. The operating system along with all other programs is stored in a regular Linux file system which physically resides on the Netgear router's 8MB of flash memory. Flash memory is nonvolatile RAM which does not lose its data when the device is powered-off. But it is RAM, i.e. it can be modified in much the same way as regular RAM - just at a slower speed. In addition to the 8MB of non-volatile flash memory for the file system, the Netgear router has 32MB of regular volatile RAM.

The content of the flash memory (i.e. the file system with all its data, including the operating system, programs and configuration data) is also called firmware. When we say that we replace the firmware of the Netgear router, we mean that we erase the content of the flash memory, i.e. it the entire file system that was stored in it - and replace it with an entirely new file system, which contains a completely new operating system, and a new set of programs and data files. Nothing from the old system will survive when the firmware is replaced.

For the initial setup of the Netgear router we will download the source code for the OpenWRT firmware and cross-compile it for the Broadcom CPU. Cross-compilation is a process where the compiler produces binary program files that are not meant to be executed on the local system, but rather on another platform (here the Netgear router with its Broadcom CPU). Then, using tricky configuration script, we will tinker with the original bootloader configuration and finally replace the Netgear firmware with our OpenWRT firmware.

Before you begin, one word of caution: Once you overwrite the original Netgear firmware, it is gone forever. No pressing of the reset button or power cycling will bring it back. If the new firmware does not work, then you have transformed your Netgear router into a nice paperweight. But fortunately, this does not happen often.

Installing SSH Daemon while keeping original Firmware

For many reasons its unnecessary to replace the original firmware of your WGT634 if you just want to run some Linux programs.(see below how to compile your program for WGT634 system with help of a toolchain)So you can install a remote shell (sshd aka dropbear) on the router an copy your favorite mips-binary via scp or netcat (nc in busybox)to /tmp directory and start it from there.

The Netgear web frontend supports to backup the router settings into a file. With the help of such a file your are able to bring files on the router.(these file are just gzipped files containing a minix filesystem container file. See below how to modify it.)

First you need to get the netgear-sar.cfg file form the follwing link: File:Netgear-sar.cfg and select the Backup Settings entry in your web frontend.Now select the downloaded file on your hard disk and press Restore. After waiting a couple of minutes the WGT634 should reboot again and you are able to request the page: http://192.168.1.1/cgi-bin/installer.sh where you can download and install the sshd-main package directly on the router.After a reboot you should be able to login via ssh with user root and your admin password.

Modify netgear-sar.cfg

To add more files to the 'restore' file, first loop mount it (require root privileges) on your development machine:

Then unpack the archive:

Now you can find 2 subdirectories in the current working directory:

Add your files into the desired position. Afterwards you have to tar the subdirectories:

Replace the config-new.lrp in the mounted container (as root):

Unmounting the container (as root):

At this point the config-file is in principle ready to use,but the web frontend checks the file for a hexadecimal CRC32 sum in the last 8 Bytes.To create a CRC32 you can use the jacksum collection. Get it from http://www.jonelo.de/java/jacksum/.

If you're getting jacksum successfully you have to truncate the last 8 bytes from the modified netgear-sar.cfg file:

Now calculate the CRC32 sum over the truncated file and append it to a complete file with correct checksum:

Now you can upload the resulting netgear-sar.cfg file with Netgear's web frontend.

CFE

Once you've got a serial console attached you can access the CFE which is a bit like the bios of the WGT634U. Start up minicom and apply power to the router while holding Control C. You should see something like the following:

Now you can get a listing of the available commands by typing 'help'. If you want to boot a kernel from a tftp server do the following:


Or you can automate the process by setting STARTUP using:

For loading rootfs over NFS


The router will now try and retrieve a kernel image called vmlinux.gz using tftp from 192.168.1.10. If this fails it will go ahead and boot the kernel on the flash. The is quite handy as in conjuction with a NFS root, it means you can do all your development without modifing the original firmware.

If your network has a DHCP server, you can do this:

OpenWRT Toolchain

Getting Started

You need a Linux system with approximately 1GB free disk space to download and compile the OpenWRT source code and the toolchain.

Netgear N600 Wndr3400v2 Firmware Update

What is a toolchain?

To build a Linux system for the Broadcom CPU, you need several tools that are not part of your normal Linux distribution. To obtain those tools, you have to download their source code and compile them on your Linux system. All these tools together make up the toolchain. Note, that the toolchain programs run on your local (Pentium-based) computer; they are only needed to build the OpenWRT firmware, but they will not be included in the firmware itself!

Quick Startup

  • svn co svn://merkur/brn/platform/wgt634u/do_dev_env.sh
  • sh do_dev_env.sh

Downloading the OpenWRT toolchain sources

First of all you need to install the openwrt toolchain ( [1] ) on your build computer.

The following tools/libs are required:

  • wget, tftp
  • cvs, subversion
  • gcc, gcc-c++, bison, flex
  • patch, gettext
  • autoconf, automake
  • zlib-devel

Compiling the OpenWRT toolchain

We need a C++-compiler, so you’ll need to patch $OPENWRT/buildroot/Makefile.

That's all: run make

If you want to build click, madwifi or a new kernel for the wgt you have to fetch our Makefiles:

Checkout the files from your $OPENWRT/buildroot/ directory:

Packages

Compiling Click

To build click you have to copy the Makefile (click.mk [3]) to the $OPENWRT/buildroot/make directory.

Netgear

That's all: run make click to build click. Currently, I only tested the userlevel click binary.

Compiling Brn

Install Click

Netgear Wndr4000 Driver Download Windows 7

Build BRN

To build brn you have to copy the Makefile (brn.mk [4]) to the $OPENWRT/buildroot/make directory.

That's all: run make brn

Compiling Services for Brn

Address Resolution Protocol (ARP) for Brn

Dynamic Host Configuration Protocol (DHCP) for Brn

Compiling Madwifi.stripped

The madwifi.stripped driver lets Click directly read and write raw frames from the wireless card, and strips out the usual driver logic.To build the madwifi.stripped driver you have to copy the following Makefile (madwifi.mk [5]) to the $OPENWRT/buildroot/make directory:

That's all: run make madwifi to build the driver.

Madwifi-API (xDoclet): [6]

Compiling New Kernel

To build the linux kernel for the wgt634u-box you have to copy the following Makefile (wgtkernel.mk [7]) to the $OPENWRT/buildroot/make directory:

If you cannot reach our repository, you have to patch the kernel by hand:

First, the stock kernel doesn’t link with gcc 3.3.3, so you’ll need to patch linux-2.4.x/arch/mips/brcm-boards/bcm947xx/cfe_flash_nvram.c.


Third, you’ll need to patch linux-2.4.x/Makefile.


Fourth, you’ll need to patch linux-2.4.x/arch/mips/Makefile.

Fifth, you’ll need to patch linux-2.4.x/arch/mips/brcm-boards/bcm947xx/compressed/Makefile.


Last, if you’re planning to run userlevel click, edit the linux-2.4.x/.config file and change the CONFIG_ETHERTAP and CONFIG_TUN lines to y.

That's all: run make wgtkernel to build the kernel.

Install to Flash

There are two ways to install a flash upgrade; from Linux or from CFE.

Via Linux

This requires a working Linux installation. The contents of the flash should not be in use - that means this method is unsuitable for upgrading a mounted JFFS2 filesystem.

Via CFE

This is a little bit more complicated, however it will allow you to recover a completely hosed system. First of all, you need to have SerialConsole access in order to get into the CFE. Second of all, the CFE flash routine will only download and flash a maximum of 4194304 bytes (4MB) at a time. To get around the 4MB limit, we need to split the image into smaller chunks and then use the =-offset= flag to flash the two parts.

Split the image on the host:

Flash the image in individual parts:

The image must contain both the kernel and the root filesystem payload. Furthermore, the root filesystem must be located at the right offset, as defined by the MTD partitioning within the kernel itself.

Troubleshooting

Sometimes you need to erase the flash (flash0.os) from within CFE first before installing a new image.First, try to create a file of size 3776k bytes and containing only 0xFF (e.g., with perl). Since flash0.os is of size 7552k bytes and 2*3776=7552, you can use the '-offset' flag to erase the two parts of flash0.os:

Compiling GPSD

Driver Game Download

To build the gpsd daemon for the wgt634u-box you have to copy the following Makefile (gpsd.mk [8]) to the $OPENWRT/buildroot/make directory:

Type 'make gpsd'; that's all.

References

  • madwifi.stripped driver ( http://pdos.csail.mit.edu/~jbicket/madwifi.stripped/ )
  • openwrt ( http://openwrt.org )
  • General information about the router ( http://pdos.csail.mit.edu/roofnet/doku.php?id=wgt634u )
  • MIT Roof Net ( http://pdos.csail.mit.edu/roofnet/ )
  • Berlin Roof Net ( http://sarwiki.informatik.hu-berlin.de/wiki/BerlinRoofNet )

Packages

  • OpenWRT ( http://downloads.openwrt.org/people/wbx/netgear/packages/ )
Retrieved from 'https://sarwiki.informatik.hu-berlin.de/index.php?title=Hacking_the_Netgear_wgt634u&oldid=5856'

Dozens of Netgear routers are vulnerable to a very old security flaw. The DNS rebinding flaws that these routers have date back to models the company put out as early as 2007. That means this issue has been lurking in the background for a very long time.

It was recently brought to light by the Vietnamese security company GRIMM and an independent security researcher known only as d4rkn3ss. Both confirm that these potentially fatal security flaws are centered around the remote management capabilities of the routers in question.

Driver Downloads For Windows 7

Unfortunately many of the impacted routers have reached their end of support life so no fix is coming. Refer to the extensive list below. If you have one of the affected routers be sure to keep an eye out for a security patch from Netgear.

If you have an older piece of equipment that isn't slated for additional security fixes, here is the solution. Your best bet is to use the browser based interface to access your router and be sure that its remote management feature is set to 'disabled.'

Note however that this will not offer bullet proof protection. Someone with physical access to your network could still exploit the issue but disabling remote administration does go a long ways in terms of protecting you and your network.

Netgear Wndr4000 Firmware

Here is the complete list of impacted Netgear routers:

  • D6300, firmware version 1.0.0.90 and 1.0.0.102
  • DGN2200, firmware version 1.0.0.58
  • DGN2200M, firmware version 1.0.0.35 and 1.0.0.37
  • DGN2200v4, firmware version 1.0.0.102
  • R6250, firmware versions 1.0.4.36 and 1.0.1.84
  • R6300v2, firmware version 1.0.3.6CH, 1.0.3.8, and 1.0.4.32
  • R6400, firmware version 1.0.1.20, 1.0.1.36, and 1.0.1.44
  • R7000, firmware versions 9.88, 9.64, 9.60, 9.42, 9.34, 9.18, 9.14, 9.12, 9.10, 9.6, and 8.34
  • R8000, firmware version 1.0.4.18, 1.0.4.46
  • R8300, firmware version 1.0.2.128 and 1.0.2.130
  • R8500, firmware version 1.0.0.28
  • WGR614v9, firmware version 1.2.32NA
  • WGR614v10, firmware version 1.0.2.66NA
  • WGT624v4, firmware version 2.0.12NA and 2.0.13.2
  • WN3000RP, firmware versions 1.0.2.64 and 1.0.1.18
  • WNDR3300, firmware versions 1.0.45, 1.0.45NA, and 1.0.14NA
  • WNDR3400, firmware versions 1.0.0.52 and 1.0.0.38
  • WNDR3400v2, firmware versions 1.0.0.54 and 1.0.0.16
  • WNDR3400v3, firmware versions 1.0.1.24 and 1.0.0.38
  • WNDR3700v3, firmware versions 1.0.0.42, 1.0.0.38, and 1.0.0.18
  • WNDR4000, firmware versions 1.0.2.10, 1.0.2.4, and 1.0.0.82
  • WNDR4500v2, firmware versions 1.0.0.60 and 1.0.0.72
  • WNR1000v3, firmware version 1.0.2.72
  • WNR2000v2, firmware versions 1.2.0.8, 1.2.0.4NA, and 1.0.0.40
  • WNR3500, firmware version 1.0.36NA
  • WNR3500L, firmware versions 1.2.2.48NA, 1.2.2.44NA, and 1.0.2.50
  • WNR3500Lv2, firmware version 1.2.0.56
  • And WNR834Bv2, firmware version 2.1.13NA

Netgear Wndr4000 Driver Downloads

If you have one of these routers, consider upgrading. Stay on guard.