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Hostnames and usernames to reserve - Geoffrey Thomas (geofft)
https://ldpreload.com/blog/names-to-reserve, posted 2020 by peter in development howto list reference security webdesign
If you're setting up a service where people can register their own usernames to be used as a hostname (
username.example.com
), email address (username@example.com
), or URL path (example.com/username
) within your domain, there are some common names you should avoid letting the general public register.
...
This is a list of all the names I know that should be restricted from registration in automated systems. If you know of others, please let me know and I'll update this page.