On 2 Mar 2019, at 01:17, Wes Hardaker <wjh...@hardakers.net> wrote:

> Michał Kępień <mic...@isc.org> writes:
> 
>>    zone "." {
>>        type mirror;
>>    };
> 
> Cool feature, and thanks for adding it.  It'll certainly make writing
> LocalRoot config updates easier.
> 
> Questions though:

https://ftp.isc.org/isc/bind9/cur/9.13/doc/arm/Bv9ARM.ch05.html#zone_statement_grammar

The zone grammar specifies an allow-notify stanza for zone/type mirror:

> zone string [ class ] {
>       type mirror;
>       allow-notify { address_match_element; ... };

Zones can be transferred from an explicit set of transfer masters, but there is 
also a default:

> A default list of primary servers for the IANA root zone is built into named 
> and thus its mirroring can be enabled using the following configuration:
> 
> zone "." {
>         type mirror;
> };
> 
> In order to set up mirroring of any other zone, an explicit list of primary 
> servers needs to be provided using the masters option (see the section called 
> “masters Statement Grammar” for details).


Joe
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