{% if network_dns_servers is defined %}
forwarder {
{%   for addr in network_dns_servers %}
{%     set reverse = lookup('community.general.dig', addr + '/PTR')[:-1] %}
{%     if reverse != "NXDOMAI" %}
    {{ addr }} port 853 authentication name "{{ reverse }}" DoT
{%     else %}
    {{ addr }} port 53
{%     endif %}
{%   endfor %}
}
preference { DoT forwarder }
{% else %}
preference { oDoT-autoconf }
{% endif %}