- Plesk Onyx for Linux
Domain zones are not synchronized with slave DNS servers;
The following records are found on the slave server in the log file
CONFIG_TEXT: general: info: zone example.com/IN: refresh: unexpected rcode (REFUSED) from master 203.0.113.2#53 (source 0.0.0.0#0)
general: info: zone fonex.kg/IN: Transfer started.
where 203.0.113.2 is Plesk server IP address.
Slave DNS Manager extension is not installed or not configured on the server.
Configure it using this guide: How to integrate Plesk with a secondary (slave) DNS server?