"DNS over HTTPS" support for Android 9 Private DNS

[lastzero]

It seems we can't use grimd as "Private DNS" on Android 9 😢

To enable this, we probably need "DNS over HTTPS" support. Is / was somebody working on it already? What would be the best way to implement it?

See https://www.quad9.net/private-dns-quad9-android9/ for details.

[lastzero]

I managed to serve DNS requests via HTTPS using https://github.com/lastzero/tinydoh (branch "lastzero") and Caddy. Still not working with Android 9. Any idea?

You can use "curl" to query my test server:

curl -D - "https://dns.liquidbytes.net/dns-query?dns=q80BAAABAAAAAAAAB2V4YW1wbGUDY29tAAABAAE"

HTTP/1.1 200 OK
Content-Length: 56
Content-Type: application/dns-message
Date: Fri, 28 Jun 2019 01:49:14 GMT
Server: Caddy

?́?examplecomexamplecom??]??"

At least the content type looks good to me. It was wrong in the upstream repo.

[lastzero]

Just learned that Google "Star Brilliant" published another DNS-over-HTTPS server written in Go: https://github.com/m13253/dns-over-https

So I guess using that makes sense instead of trying to build upon tinydoh and fix the issues.