I have a Virtualmin slave server for DNS, and many Virtualmin master servers that communicate with slave correctly (all updates and changes occurs fine).
But I have a new master server that don't update its records to slave (as it happened before). All the transfers indicate success messages with X records, but none are transfered indeed.
I have solved this problem before (reading many many posts here) but in this time I can't figure out why it don't works.
I remember there are some "tips" that don't appear in the Official Documentation: http://www.virtualmin.com/documentation/dns/slave-configuration
And I have tried everything. Nothing works :(