Quad9

Quad9 is a public DNS resolver service run by the not-for-profit organization contributed by IBM, Packet Clearing House (PCH), and Global Cyber Alliance (GCA).[1] At its core, the main differentiator from other DNS resolvers is that it automatically blocks domains known to be associated with malicious activity.[2][3] In addition to standard DNS service, it also offers an experimental DNS over TLS service over port 853.[4][5]

IP Addresses

Quad9 is accessible via the anycast IP addresses for IPv4: 9.9.9.9 (hence its name) and 149.112.112.112, and IPv6: 2620:fe::fe and 2620:fe::9.[6]

Quad9 supports DNS over TLS on port 853 (the standard) using an auth name of dns.quad9.net.

See also

References

  1. ↑ "Quad9 Founding Organizations". Quad9. Retrieved 2018-04-08.
  2. ↑ "FAQ: How does Quad9 protect me from malicious domains?". Quad9. Retrieved 2018-04-08.
  3. ↑ "New "Quad9" DNS service blocks malicious domains for everyone". Ars Technica. Retrieved 2018-04-08.
  4. ↑ "FAQ: Does Quad9 support DNS over TLS?". Quad9. Retrieved 2018-04-08.
  5. ↑ "Privacy: Using DNS-over-TLS with the Quad9 DNS Service". Medium. Retrieved 2018-04-08.
  6. ↑ "FAQ - DNS Need to Know Info". Quad9. Retrieved 2018-04-08.
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