Can Proxy SG recognise this protocol. How to prevent it if needs to be.
So, can we block the DoH in 7.1 and how to do that?
DoH wil be supported in 7.2 which is targeted for 2H2019. Now you can try to block MIME types "application/dns-message" (for UDP wireformat) and "application/dns-json" (for JSON format).
Thank you Pavel for the quick response! That helped.