Before using software tools, try a "30-30-30" reset to clear the NVRAM: Hold the reset button for while powered on.
Connect your PC directly to one of the router’s LAN ports using an Ethernet cable. Netgear R6300 Firmware Recovery Utility
Ensure you have the correct firmware for your specific hardware version (R6300v1 vs. R6300v2) from the Netgear Support Download Center . Before using software tools, try a "30-30-30" reset
For older versions of the R6300, Netgear provided a dedicated software utility on the original Resource CD. Must be run as an Administrator on your PC. Before using software tools
This is the most reliable way to force-load firmware when the web GUI is down.
Manually set your computer’s IP to 192.168.1.10 and Subnet Mask to 255.255.255.0 .