Operating system: Ubuntu
OS version: 20.04.2
Virtualmin version: 6.16
Webmin version: 1.973
Update/Upgrade date: 2021-04-20
Slave DNS server: used, working and sync instantly when manually creating new records
While trying to generate a Wildcard Let’s Encrypt certificate with Virtualmin for a domain that syncs its DNS records to a slave DNS Virtualmin server, the DNS challenge fails, and I can see by using dig
many times during the attempt that the record _acme-challenge.mydomain.com
is not synced even once.
When manually creating any type of DNS record, it is instantly synced with the slave server.