When this option is set to yes, and when a query is being answered from authoritative data, the additional data section of the reply is filled in using data from the cache.A list of IP addresses of name servers that are also sent notify messages when a new copy of the zone is loaded, in addition to the servers listed in the zone’s NS records.In the processing of the update packet, the allow-dnsupdate-from and TSIG-ALLOW-DNSUPDATE are processed first, so those permissions apply before the forward-dnsupdate is used.
However, issues arise when that protocol becomes extensively trusted by systems.
A setting to enable/disable DNS update support completely.
The default is no, which means that DNS updates are ignored by Power DNS (no message is logged about this! Change the setting to dnsupdate=yes to enable DNS update support. A list of IP ranges that are allowed to perform updates on any domain.
Controls the behavior of an authoritative server when answering queries that have additional data, or when following CNAME and DNAME chains.
When this option is set to yes, and when a query is being answered from authoritative data, the additional data section of the reply is filled in with data from other authoritative zones.