question about IPv6-DNS-nameserver link-local (with Interface-name)

Frank Bulk ( frnkblk at
Mon Jul 7 05:42:10 CEST 2014

Have any of you opened an ISC BIND bug?


-----Original Message-----
From: at [ at] On Behalf Of Tony Finch
Sent: Tuesday, July 01, 2014 11:55 AM
To: admin at
Cc: ipv6-ops at
Subject: Re: question about IPv6-DNS-nameserver link-local (with Interface-name)

Thomas Schäfer <thomas at> wrote:
> Opensuse/NetworkManager writes to /etc/resolv.conf
> nameserver fe80::d27a:b5ff:fe7b:e152%wlan0
> So far so good.
> But not all applications accept this DNS-Resolver.
> "host" and "dig" make problems.
> But I am not sure, where is the bug?

I think the bug is that host and dig fail to read the scope on the
link-local address. (This is a bug in the BIND lwres resolv.conf
parser which dig and host use.)

> Is it ok, to assign link-local-addresses in /etc/resolv.conf?

I think most libc resolvers handle them correctly. Your milage will
obviously vary with other code. For example, ldns also fails to handle
scoped IPv6 addresses.

f.anthony.n.finch  <dot at>
Tyne, West Dogger: Variable 3 or 4, becoming southerly 4 or 5 later. Slight.
Fair. Good.

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