Problem with rfc7706 config

Tuomo Soini tis at
Mon Apr 8 12:42:39 UTC 2019

On Mon, 8 Apr 2019 15:25:56 +0300
Tuomo Soini via Unbound-users <unbound-users at> wrote:

> > Problem is there will not be zonexfer of zone. My guess is unbound
> > only tries ipv6 addresses of masters. When dns name is used,
> > I'd expect unbound to use both IPv4 and IPv6 addresses for axfr when
> > server name has both addresses.

I tried this config too, and it doesn't work on v4 only system:

# This is rfc7706 config
        name: "."
        for-downstream: no
        for-upstream: yes
        fallback-enabled: yes
        zonefile: /var/lib/unbound/
        master: 2620:0:2d0:202::132
        master: 2620:0:2830:202::132

Only after I comment out ipv6 addresses zonexfer will happen.

unbound-1.9.1 is the version I run.

Tuomo Soini <tis at>
Foobar Linux services
+358 40 5240030
Foobar Oy <>

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