alt Hacker NewsI can say, as a SysAdmin, I have been taught and tell my users to check the domain to verify a website is real.
It's a strange edgecase that the owner of John.Doe.com does not need to own Doe.com
In every other case that I know about, to own the Joe subdomain of Doe.com, you would need to own Doe.com
edit: I guess I've gotten so used to the government 3LDs I just don't even see them anymore, or just see something like .co.uk or .edu.us as a TLD by itself, but yeah those exist too. Still the exception to the rule
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Looking at the threads below, very few people are discussing technical things in dns terms like zone or nameserver.
Yeah. The way how most things on the internet prove ownership make the assumption that the 3ld is owned by the 2ld. Extend it once out for country specific ones and you cover most cases that people have to work with.
Then when you consider DNS is fundamental infrastructure and people build secure things on top of it, (ahem DNS challenges for certs), it's remarkable that anyone would want or desire edge cases.
Yet that is a problem the owner of such a domain has freely entered into by buying that domain, it's their right to keep it despite this apparent problem, if they wish.
Hello sysadmin. Good luck navigating the internet.
What you should know, and what your browser does know and automatically applies cookie policy and colouring your URL bar, is the Public Suffix List: https://en.wikipedia.org/wiki/Public_Suffix_List
It will let you know that, for example, one does not need to own .co.uk to own the subdomain foo.co.uk.
There are still exceptions to this like .co.uk and many others.
That is definitely not true. There are literally thousands if not tens of thousands of well known domains that do this. .co.uk is a very common example.