RPZ zone name label length limit

Mukund Sivaraman muks at isc.org
Thu Jun 29 18:40:54 UTC 2017

Hi Jim

On Thu, Jun 29, 2017 at 01:57:16PM +0000, Jim Yang wrote:
> Hi,
> What is the DNS name label length limit? As per RFC 1035, it is 63
> characters.  I tested a few DNS names that contains a label that is
> longer than 63 characters, and found that these records were
> successfully loaded in RPZ zone. I wonder if this is a BIND RPZ
> feature or bug (it allows DNS name label that is longer than 63
> characters)?
> When I dig these DNS records using, which reports them as

Can you send us a bug report with a sample RPZ zone that contains such a


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