XR500 drops internet

I bought the xr500 a few months ago around june, it was working perfectly fine since then up until a week or so ago. I called in my isp technician to see if they could help with the issue but ultimately couldn't because it was my own hardware. I was however recommended to try a hardwire connection which I did and worked perfectly until today when I got disconnected from it twice, when I went to check on my router the internet LED was a dull orange then all the LEDs turned off except for the power which turned orange after a few short seconds all lights turned back on like normal as if nothing happened. I don't know why this is happening but when I looked into dumaos system information logs it said that there were dos attacks around the 2 times I did disconnect from the internet. I should mention that I did factory reset the router before and all the apparent issues were almost immediately solved, but now it seems they have returned. I have an arris surfboard model sb8200 for the modem my router is connected to. I am running V2.3.2.56 Firmware, any help with this would be greatly appreciated!