setup_trusted_dns.sh

#!/bin/bash
add_dns_config() {
	local interface=$1; shift
	sudo networksetup -setdnsservers "${interface}" $@
}

main() {
	local servers=
	servers=()
	local line=
	while read line; do
		local s=
		s=$(echo $line | cut -d" " -f 1)
		servers+=($s)
	done

	for i in 'Wi-Fi' 'Thunderbolt Ethernet'; do
		add_dns_config $i ${servers[@]}
	done
}

main <<EOF
2a01:4f8:161:4109::6    ns25.de.dns.opennic.glue
2a02:e00:fffd:139::9    ns3.nw.de.dns.opennic.glue
2620:0:ccc::2           OpenDNS
2620:0:ccd::2           OpenDNS
5.9.49.12               ns24.de.dns.opennic.glue
130.255.73.90           ns3.nw.de.dns.opennic.glue
85.214.20.141           digitalcourage.de
194.150.168.168         CCC
213.73.91.35            CCC
EOF