Windows 10: Random Security Alert from cloudflare-dns.com?

I have absolutely no idea what this is, but I keep getting a security alert pop up in the background every minute or so, and when I click for more details it says the certificate is intended to ensure the identity of a remote computer from cloudflare-dns.com. I don't know what that is and Google hasn't been particularly helpful so far. Any help is appreciated.

Windows version 1809




:)

 

Cloudfare, Quad9, Google, OPEN - the DNS wars!

Extensive list of DNS services:
Secure DNS servers

Keeping it updated for 4 years now. Currently, Cloudflare DNS holds the crown in 2 departments, performance and privacy. Stay away from Google though. It's an option, but I wouldn't recommend it.

 

Cloudfare, Quad9, Google, OPEN - the DNS wars!

thank you kindly, I feel much more confident now switching to Cloudflare. ALL HAIL! REZJOR!

 

Irritating Security Alert

Sounds like you've chosen Cloudflare's DNS servers at 1.1.1.1 and possibly also 1.0.0.1 as your DNS servers. If accessing those servers brings certificate issues along with it, that would explain what you're seeing. That said, I just changed my DNS assigments to those addresses, and I'm not getting any such error message. You may want to check your IPv4 properties for your active NIC and see if it looks like this:



If it does, you could try changing those addresses to Google's temporarily 8.8.8.8 and 8.8.4.4 (IPv6 addresses are 2001:4860:4860::8888 and 2001:4860:4860::8844). If making that change (or those changes) causes the alert to go away, that would count as proof positive that something is amiss with Cloudflare's certificate(s).
I'm incredibly curious about what's going on here, so please follow up, won't you?
Thanks,
--Ed--