@Razvan974 If I understand the issue correct, the AX73 can work fine with most of the NAS in the market without an issue. But to be honest, why this QNAP 231P NAS causes it to reboot, we don't know,...

@Vantroy I guess not. Do you have a speed issue with the router? You may describe your issue in detail first, we can confirm. Meanwhile, you may refer to the troubleshooting suggestions to check the...

@gary51 Do you have internet access on those wired devices when they connect to the C5400X with Ethernet cables? What are the 8 devices? Are they getting valid IP address from the router? You can...

@everclear Thanks. We have reported the issue to the support engineers, they will likely reach out to you via email to continue to troubleshoot your issue.

@Mihai_RO To locate this issue and try to fix it, we would like to follow up on your case via email. Please check your inbox and provide the information that we need.

@everclear Have you confirmed the modem stability by connecting a computer directly to the modem and test the internet? We hope you could verify this first, then we can investigate further.