Zentyal 5.0.8
Hi,
the tab Network > DNS says "The Zentyal DNS module is installed and enabled, so only the local DNS server will be used to resolve the queries. [...]". That used to work until Zentyal 5.
Unfortunately with Zentyal 5 the local DNS server is NOT the local resolver - as I can see in resolv.conf - but the DNS servers received via DHCP (DHCP is enabled for the external interface).
In short: Zentyal doesn't overwrite the DNS servers received via DHCP with 127.0.0.1 when the DNS module is enabled.