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by subwindow 2631 days ago
This has negative implications for security. For instance, one reason why DNS resolvers might block or modify requests is to blacklist domains used for malware operation (botnet C&C domains). Other things like DNS sinkholing and poisoning are also frequently used as tools to disrupt malware communication.

In addition, collection and analysis of below-the-recursive DNS traffic is one of the primary ways in which security researchers discover the infrastructure of botnet networks.

Overall DoH is probably a net positive, but I don't see downsides like this being discussed.

2 comments

You can currently customize the trr address in firefox, so assuming you trust a network box's single HTTPS certificate, it can also run a DoH server.
> This has negative implications for security.

Yeah, Erdoğan won't be able to block oppositions' web sites. That is a very big threat! /s