Flush the DNS cache on your connected computers ( ipconfig /flushdns in Windows Command Prompt) to ensure they pull clean IP routing data from the updated gateway.
You can verify your current firmware through the device’s web interface: CG3000D Firmware - the NETGEAR Community kaon cg3000 firmware update exclusive
Solution: Your ISP uses a custom certificate. You must use the unlock_cert.sh script (included in our exclusive download pack) to bypass the vendor lock. Flush the DNS cache on your connected computers