# Set fleet-wide DNS to Quad9 (9.9.9.9 and 149.112.112.112)
# Applies to: /ip dns, all DHCP networks, all PPPoE profiles

/ip dns set servers=9.9.9.9,149.112.112.112
/ip dhcp-server network set [find] dns-server=9.9.9.9,149.112.112.112
/ppp profile set [find] dns-server=9.9.9.9,149.112.112.112