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by dgl 914 days ago
You're looking for DNS rebinding protection, many DNS servers support it. However there are some cases where things do use private IPs in DNS records outside of the local domain, one example is Plex (e.g. https://support.plex.tv/articles/206225077-how-to-use-secure... suggests turning off DNS rebinding protection) -- although in some cases you can allow particular domains which is a much better way than turning it off entirely.

(See also the sibling comment about microsoft.com being IPv6 only as a result of a particular implementation of DNS rebinding protection: https://news.ycombinator.com/item?id=38704159)