@hisanabe Given the last screenshot (before rebooting AX20) and name resolution issue you mentioned, I would assume the same. If your cable router can be configured in bridge mode and AX20 as main...

@hisanabe OK. So 192.168.1.2 should be the AX20, right ? As I can see from the Windows client the DNS IP address which it receives is 192.168.1.2 which is AX20 IP address. You have Internet...

@hisanabe I presume the DNS seen in command prompt are the ISP DNS, right ? What's the device with IP address 192.168.1.1 ? Have you browsed into Japanese router IP network to see if any advanced...

@hisanabe What's your main router make and model ? Try with ipconfig/all command, so you can see the DNS details.

@Sam-eer Follow your device user guide to configure this - there's a similar example only that the target should be Any Host:

@hisanabe In general there should be only one DHCP server in your network otherwise it could get messy. I didn't realize that you were using the AX20 as DHCP/DNS server : Are you saying that after...