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Multiple Brazilian sites (eg uol.com.br, amazon.com.br) are down due to what looks like a DNSSEC issue on .com.br:

dnsviz.net/d/www.uol.com.br/dn

dnsblacklist.org/?domain=www.u

If you can't reach your favorite Brazilian sites, that's probably why.

And if you can reach, it means your DNS resolver is probably not doing DNSSEC validation properly - which they should be.

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