Unraid is sporadically taking down my internet

[mdr]

I've been using Unraid for almost a year now and love it so much! However, recently, I've been trying to figure out an issue and haven't had any luck so far. I'm hoping someone here will be able to provide some insight or perhaps a suggestion or two for helping me debug this.

 

I'm using Unraid 6.8.3 and for about a month now, Unraid has been taking out my internet at my house. This will happen every few days or so. When it happens, I can see that the router no longer shows any physical devices connected (however, I have three physical devices connected, including the server). The wireless devices still show up and can access each other. On the wireless devices (such as my laptop, or phone), I cannot access the internet. It's also not a DNS issue as I can't even ping 8.8.8.8. The second I unplug the Unraid server, everything starts working again. If I plug the server back in, everything stops working. The only fix so far has been hard restarting the Unraid server.

 

To debug this, I've tried changing an abundance of router settings, and I even factory reset the router, and the issue continues to occur. I also don't see anything that stands out in the router logs when this happens.

 

On Unraid, I'm using a bonded network config in active-backup mode. Although, I also tried using a single unbonded nic and the issue still occurred. For docker, most docker containers are using the bridge network, however, two of them are using a custom bridge network to be able to use a 192.168.1.x IP. They are statically configured to use 192.168.1.111 and 192.168.1.123 (much higher than devices are assigned on my network).

 

Does anything stand out when you hear this particular problem? I'm all ears at this point as my server knowledge tends to break down quite a bit when it comes to networking issues.

 

Thanks!

Edited July 6, 2020 by mdr

[BRiT]

Post Diagnostics file in your Next post after the issues happen again and before you reboot or turn off the server.

 

Your server may be compromised, so check the logs for any remote connections especially if you expose your server directly to the net.

[mdr]

Yeah, that’s a good idea. Next time it happens I’ll connect a monitor and keyboard and pull off the logs (since I can’t access it remotely when it’s happening). I don’t think it would be a remote connection though as the only docker container exposed to “the world” is the OpenVPN container. The server itself is not exposed in any way outside of my local network. I’ll see what those logs say though after it happens. 

Edited July 7, 2020 by mdr

[Jerky_san]

When it happens again try to ping the gateway(router) from the wireless access points and unraid itself. Also what kind of router are you using?

[mdr]

I'll give that a try as well when it happens again. The router is a Netgear R6700v2 with the latest firmware.