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DNS hijacking
(lemmy.world)
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this post was submitted on 16 Aug 2023
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I can, they get redirected to my ISPs DNS, no matter what. This was not an issue with my pervious company.
How are you detecting this? Just curiosity
Often, if you try to go to a non-existent domain, it'll still return an IP address that loads a "this site doesn't exist" page hosted by the ISP, often full of sponsored links, similar to a domain parking page.
It's trivial to do this. DNS requests are unencrypted and can easily be modified by an ISP, even if you use a custom DNS server like Google's 8.8.8.8 or Cloudflare's 1.1.1.1. You need DNS over HTTPS or a similar technology to prevent this happening.
hijacking dns is also my provider's first action when you're late paying the bill. by ip or doh or a long-lived dns cache and you're still going, but anything looked-up via a 'regular' dns server goes nowhere. that gets you another 2-3 weeks until they deny the modem from even authenticating.