Websites hosted in Plesk are not accessible.
DNS zones are not synchronized via the Slave DNS Manager extension.
It is not possible to telnet to the server locally on port 53:
# telnet localhost 53
telnet: connect to address ::1: Connection refused
telnet: connect to address 127.0.0.1: Connection refused
The DNS Server (BIND) service is stopped in Plesk at Tools & Settings > Services Management:
Start the DNS Server (BIND) service:
In Plesk, go to Tools & Settings > Services Management.
Click the button next to the DNS Server (BIND) service.