Indicator that DoT is active is missing in DNS configuration

[peppetech]

I didn’t know that quad9 has a setup guide for IPfire,

if I remember right, Quad9 actually had a rep here in the community. I have to search and find his handle.

I have been also wondering how "check DNS Servers " works in IPFire.
perhaps just querying with “dig” and analyzing flags??

dig ipfire.org @9.9.9.9 +dnssec

by the way I watched the YT video you posted above, and I am not getting an impression that quad9 is in the DNS business for purely “Not for profit” . It appears that they have a large PR budget.
but I don’t know anything about them.

I also found the discussion with their rep:

Misinformation about Quad9

Hi. I note that a blog posting just went up, disrecommending the use of Quad9 on the grounds that it’s commercial, which is not the case. It’s a not-for-profit public-benefit organization, supported entirely by donations. Also, you’ve got a list of recursive resolvers which similarly mischaracterizes Quad9, suggesting that it does not support DNSSEC (which is not the case, to the best of my knowledge, Quad9 was actually the first global-scale public recursive resolver to do universal DNSSEC v…

I use some of the recommended DNS servers in Wiki,
You will notice that “the not for profit” ones, are slower than the “for profit” ones like 1.1…1. or 2.2.2.