Hints for forwarding a subdomain on a authoritative server

[Sten Carlsen]

Thanks

Sten

> On 6 Jul 2020, at 16.03, Tom <lists at verreckte-cheib.ch> wrote:
> 
> Hi list
> 
> Our BIND (9.16.4) is authoritative for zone "example.com". Now I need to forward a subzone "sub.example.com" to another nameserver instance on the same server, running for example under port 5353:
> 
> A few years ago, this topic was already discussed:
> https://lists.isc.org/pipermail/bind-users/2009-April/076156.html
> 
> My BIND config looks like this:
> ================== SCHNIPP ==================
> zone "example.com" {
>        type master;
>        file "master/example.com.hosts";
>        };
> zone "sub.example.com" {
>        type forward;
>        forwarders { 127.0.0.1 port 5353; };
>        forward only;
>        };
> ================== SCHNAPP ==================
> 
> In the zonefile for "example.com" I have a delegation like this (as described in the post above):
> 
> sub.example.com.            IN      NS      subns.example.com.
> 
> So, the authoritative server understands not to be responsible for this zone and forwards the request to the other nameserver.
> 
> But: The zone-forwarding is only working, when I enable "recursion" on the authoritative server. Does this means, that zone-forwarding really requires recursion?
Yes.
> Is there a better way with not enabling recursion (perhaps with views) to accomplish this?
Stub zones are normally recommended instead.
> 
> Many thanks for any hints.
> 
> Kind regards,
> Tom
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