@HP41 What about posting the trace while pinging port 11 and other ports so we can find the differences and help you troubleshoot it?

In that particular time frame your ER605's WAN used to get down.

@Heisenberg0709 You can try plugging the cable that used to plug into your router's WAN port into your computer's network port. Then you can check if the PC has an Internet connection at the time...

@JarekPrzybyl It seems that the VPN connection is fine. Have you ever tried tracerouting DNS Server 1.1.1.1 to check if the access path includes the remote gateway? You can give it a try. Maybe...

@JarekPrzybyl Maybe you can export the connection log from your OpenVPN Application to have a check.

@wendland Do you mean using Omada Controller? If so ,you can refer to 4. 10. 8 POE Schedule in this link...