Nmrpflash uses Netgear's NMRP protocol (http://www.chubb.wattle.id.au/PeterChubb/nmrp.html) to flash a new firmware image to a compatible device. It has been successfully used on a Netgear EX2700, DNG3700v2, R6220, R7000, D7000, WNR3500, R6400 and R6800, but is likely to be compatible with many other Netgear devices.