2.1)
server:
forward-zone:
name: "."
forward-ssl-upstream: yes
forward-addr: 9.9.9.9@853
forward-addr: 149.112.112.112@853
2.2)
server:
forward-zone:
name: "."
forward-tls-upstream: yes
forward-addr: 9.9.9.9@853
forward-addr: 149.112.112.112@853
2.3)
server:
forward-zone:
name: "."
forward-tls-upstream: yes
forward-addr: 9.9.9.9@853#dns.quad9.net
forward-addr: 149.112.112.112@853#dns.quad9.net
forward-ssl-upstream: <yes or no>
Alternate syntax for forward-tls-upstream.