Stubby: Comment, Fallback server, Separate server for guest

Installing and Using OpenWrt
1
  1. How to comment in stubby
  2. How to setup Fallback Servers
    I have 4 Address (2 of IPv4/6) for my 1 NextDNS server. How to setup fallback server ? How would it detect if it's down?
  3. How to have a separate server for guest zone
2

1 / dunno - just spek to yourself
2 / client retries in (short) timeout
3 / you can have unlimited dnsmasq instances but not via luci

3

How to setup different instance for guest ? FOr the config stubby 'guest' how to set resolver ?

config stubby 'global'
	option manual '0'
	option trigger 'wan'
	list dns_transport 'GETDNS_TRANSPORT_TLS'
	option tls_authentication '1'
	option tls_query_padding_blocksize '128'
	option edns_client_subnet_private '1'
	option idle_timeout '10000'
	option round_robin_upstreams '1'
	list listen_address '127.0.0.1@5453'
	list listen_address '0::1@5453'
	option appdata_dir '/tmp/stubby'
	option dnssec_return_status '1'

config stubby 'guest'
	option manual '0'
	option trigger 'wan'
	list dns_transport 'GETDNS_TRANSPORT_TLS'
	option tls_authentication '1'
	option tls_query_padding_blocksize '128'
	option edns_client_subnet_private '1'
	option idle_timeout '10000'
	option round_robin_upstreams '1'
	list listen_address '127.0.1.1@5454'
	list listen_address '0::1@5454'
	option appdata_dir '/tmp/stubby'
	option dnssec_return_status '1'

config resolver
	option address 'xx'
	option tls_auth_name 'xx.dns.nextdns.io'

config resolver
	option address 'xx'
	option tls_auth_name 'xx.dns.nextdns.io'

config resolver
	option address 'xx'
	option tls_auth_name 'xx.dns.nextdns.io'

config resolver
	option address 'xx'
	option tls_auth_name 'xxx.dns.nextdns.io'