nmrpflash for Mac

nmrpflash - Netgear Unbrick Utility

nmrpflash uses Netgear's NMRP protocol to flash a new firmware image to a compatible device. It has been successfully tested with various models (D7000, DC112A, DNG3700v2, EX2700, EX6100v2, EX6120, EX6150v2, EX8000, R6020, R6080, R6100, R6220, R6400, R6700v2, R6800, R6900v2, R7000, R7000P, R8000, R8000P, R8500, RAX40, RAX75, RBR40, RBS40, RBR50, RBR50v2, RBS50, SRR60, SRS60, WAX202, WNDR3800, WNDR4300, WNDR4500v3, WNDR4700, WNR3500), but is likely to be compatible with most other Netgear devices as well.

mmrpflash is a cross-platform utility, working on Linux, macOS, Windows, the BSDs, and possibly other POSIX compatible systems. Prebuilt binaries for Linux, macOS and Windows are available here (Npcap is required on Windows - install with "WinPcap Compatibility" enabled). A FreeBSD package can be fetched and installed using the pkg command.

On Linux and macOS, Homebrew is the preferred method of installation! Packages maintained by your Linux distribution may be outdated (check this site).

Using nmrpflash

First, download the correct firmware image for your device. When downloading from the Netgear site, the firmware is usually contained in a .zip file - extract this first. The actual firmware file will have an extension such as .chk, .bin, .trx or .img.

Now, using an Ethernet cable, connect your Netgear router to the computer that will run nmrpflash. Use the LAN port, which is often colored blue on Netgear devices. If the router has multiple LAN ports, use the one labeled _1_.

Next, you'll have to determine which network interface corresponds to the one connected to the Netgear router. All available interfaces can be listed using

For the rest of this example, let's assume that your router is connected to eth2, and that you want to flash a firmware image named EX2700-V1.0.1.8.img.

First of all, turn off the router. Then start nmrpflash using the following command:

As soon as you see the Waiting for Ethernet connection. message, turn the router on (Note that one some devices you'll have to hold the reset button while powering on the device, otherwise it won't work!) If all went well, nmrpflash will continue printing messages:

Now reboot the device, and you're good to go.

Common issues

In any case, run nmrpflash with -vvv before filing a bug report!

"Error while loading shared libraries: ..." (Linux)

You must install your Linux distribution's libpcap and libnl-3 packages (exact names will vary depending on your distribution).

On Debian based distros (such as Ubuntu) you can install these dependencies with

sudo apt install libpcap libnl-3

"The program can't start because wpcap.dll is missing" (Windows)

Install Npcap with "WinPcap Compatibility" enabled.

Version 0.9.13 was the last version to support Windows XP.

"nmrpflash cannot be opened because the developer cannot be verified." (macOS)