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How to tell if my network's faulty? (programming.dev)

submitted 3 days ago* (last edited 3 days ago) by staircase@programming.dev to c/linux@programming.dev

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I have a number of hints that my internet connection doesn't work right. I see things like can't connect to addresses from docker, pages will be slow in my browser. Before I used ethernet to my router, I would sometimes disconnect from the internet. Aside from disconnecting, none of it was a clear sign something is unusually broken. Is there some linux (Ubuntu) tool I can use to assess the long-term health of my connection?

A nice to have: the tool would tell me whether a fault is in my drivers, settings, adapter, router, connection to the house, or my provider.

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[–] staircase@programming.dev 1 points 2 days ago* (last edited 2 days ago)

I changed my DNS on the router. Page loads seem to be faster.

Also discovered Mullvad's fancy blocking DNS servers https://mullvad.net/en/help/dns-over-https-and-dns-over-tls

~~Just trying the docker thing to see if it works~~ docker test was inconclusive

will need much more time to see if reliability has generally improved