...for what, specifically?
this post was submitted on 12 Aug 2026
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Privacy
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I think they mean Cloudflare captcha but I don’t know that Quad9 has something like that
I use it for dns
Four 9s? How is anyone going to remember that?
Quad9 for Quadruple Nine
Zoom. (Or whoosh.)
IPv4:
- 9.9.9.9
- 149.112.112.112
IPv6:
- 2620:fe::fe
- 2620:fe::9
All from memory lol. I set it up a lot for people at home and businesses. That's for DNSSEC, filtered, non ECS.
Edit: you can also use https://dns.quad9.net/dns-query for mobile iirc.
I use it as my upstream DNS setup on my two piholes.
I used to use quad 9 but stopped using it after running into too many issues where it provided completely wrong results. Like not even outdated results just straight up wrong values that never existed, with both public websites as well as customer dns entries that I have managed for over a decade.
A lot of fediverse instances for some weird reason use Cloudflare for captchas and espionage. I assume it's a sort of "genre-blind" offloading hardware work moment, if not something like being Class Traitors, because one of the big reasons people come to the Fediverse is precisely to escape the grip and decision power of giants like CF.
Seems a little odd that the fediverse uses Cloudfare.
You need to be more descriptive, use in what regard? Both are capable DNS providers but as far as I’m aware, Cloudflare is also a domain registrar.
Also each instance of Lemmy is configured differently, perhaps Lemmy.zip uses cloudflare but that isn’t the case for every instance of Lemmy.
Yeah the mentioned capcha features of CloudFlare are a reverse proxy & caching CDN they provide; Quad9 is a DNS resolver only AFAIK.
Cloudflare also provides DNS resolving, but this isn’t something that a fediverse instance can put between itself and the user (that’s DNS hosting, which would probably be set up in connection with the aforementioned reverse proxy and CDN services)
Some folks are commenting here that they have had Quad9 issues with reliability; if true that’s a recent occurrence as I used them for years as a resolver without issue (been using my ISP as a DNS resolver for about 2 years now as I’ve moved and haven’t had the ability to set up my old servers in my new location. Soon, I hope!)
I've never been able to chase it down, but Apple devices on my network always seem to have issues accessing some sites when using quad 9 for DNS. No problems with cloudflare, though. 🤷♂️
1.1.1.1 does no filtering. 9.9.9.9 does, similar to 1.1.1.2. To skip filtering use 9.9.9.10.
Thanks! I'll give that a shot. I didn't do much troubleshooting because other devices could access those sites just fine using 9.9.9.9, so I figured it was something weird in Apple's system.
Is Q9 as easy to use?
Yes, quad9 is a DNS provider, meaning the way to configure quad9 as your DNS provider is the same as configuring cloudflare but instead of 1.1.1.1 it's 9.9.9.9 (hence the name quad9)
edit: if you're using android or a browser (or really anything that uses DNS over https), the URLs are different, but you can find more info at https://quad9.net/