u/Nameless00001

Firmware V1.2.7.2

I have spent the better part of 4 hours today trying to figure out why this router is blocking one of my 55 connected devices. The device is a Debian 12 server that I use for home assistant. I had some devices complaining of DNS issues so decided to update the router's DNS options to point at Google 8.8.8.8. After that the PC no longer could access the outside web.

I initially thought it was the machine itself and not the router. I did every possible test I could, deleting network settings along the way. I removed it from my static IP list and changed it from a wired to a wireless connected PC for further testing. After not being able to get anything to work externally, I spoofed the MAC address with a temporary change and this instantly allowed me to ping Google. Within 5 minutes I couldn't again.

I'm at a loss on this one and am about to factory reset the router in hopes that I can revitalize it. It is 3 days outside the return window and I am livid. I did make a backup of the router that I could restore in hopes that I can save my 30 or so static IP settings. I've also disabled every possible security setting in that router because it has been temperamental with so many of my devices since I bought it.

Any advice or recommendations to try before I take the nuclear option?

Edit: I decided to connect my PC to my phone's hotspot and it worked immediately. I then disconnected the hotspot allowing it to remain on the wired connection to the router and it kept working for about 2 minutes. Then it died again. It is like while I was connected to both the wired connection and my hotspot, it confused the router for a few minutes after and still allowed a connection.