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Cannot reset DNS Settings (lemmy.world)

submitted 6 months ago by RVAtom@lemmy.world to c/selfhosted@lemmy.world

4 comments fedilink hide all child comments

I want to undo some of my setup on my network so I can redo it in a different configuration on the same machine. The first thing I wanted to do was disable my Adguard server, making sure I could still use the internet after.

I thought I had cleared out all of the settings in my router that made it use Adguard for DNS, but when I shut down Adguard afterward, all outside connectivity fell apart. I could still get to websites if I knew their specific IP address, but nothing that needed DNS worked. When I booted Adguard back up, everything started working again.

I have tried several options in the DNS server settings in my Asus router (TUF-AX5400). Is there something I need to do in Adguard first to make this work? Or is this maybe something I need to reset in my Asus router and then give it time and a few reboots to work?

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[–] hungover_pilot@lemmy.world 15 points 6 months ago

Once you change your DNS server in your router, make sure to renew your clients DHCP lease. It may still be using the stale DNS server. On windows verify its using the new DNS server with: ipconfig /all

[–] HybridSarcasm@lemmy.world 9 points 6 months ago

This is really more of a home networking issue than anything having to do with self-hosting, especially since it centers on a consumer router. Please consider posting this in one of the many Lemmy home networking communities.

[–] oleorun@real.lemmy.fan 9 points 6 months ago* (last edited 6 months ago)

Try using 1.1.1.1 or 8.8.8.8 as the external DNS in your router for testing. Does it work then?

Also, you may have DNS cached somewhere. You can flush your Windows DNS cache by typing ipconfig /flushdns in a command prompt.

[–] Markaos@lemmy.one 2 points 6 months ago

Are you sure you didn't set DNS directly on some/all of your devices? Because in that case they won't care about the router settings and will use whatever you set them to.

Also as the other commenter said, DNS changes might not propagate to other devices on the network until the next time they connect - a reboot or unplugging the cable from your computer for a few seconds is a dirty but pretty OS agnostic way to do that.