Knowledge Base ISC Main Website Ask a Question/Contact ISC
Why do queries for NSEC3 records fail to return the NSEC3 record?
Author: ISC Support Reference Number: AA-00289 Views: 7151 Created: 2011-05-10 14:46 Last Updated: 2017-03-01 17:43 0 Rating/ Voters

Although NSEC3 records are present as part of a signed DNS zone's representation (in master files and zone transfers), they are strictly metadata and cannot be queried for directly. The owner names of NSEC3 records do not form a part of the DNS domain tree. Signing a zone using NSEC3 records does not bring names into existence that do not exist in the unsigned version of the zone.

NSEC3 records are only returned in the authority section of  negative replies to DNS queries (negative replies such as NXDOMAIN and NODATA - see RFC 2308) and are used specially in validating the proof of non-existence.

© 2001-2018 Internet Systems Consortium

For assistance with problems and questions for which you have not been able to find an answer in our Knowledge Base, we recommend searching our community mailing list archives and/or posting your question there (you will need to register there first for your posts to be accepted). The bind-users and the dhcp-users lists particularly have a long-standing and active membership.

ISC relies on the financial support of the community to fund the development of its open source software products. If you would like to support future product evolution and maintenance as well having peace of mind knowing that our team of experts are poised to provide you with individual technical assistance whenever you call upon them, then please consider our Professional Subscription Support services - details can be found on our main website.

  • There is no feedback for this article
Quick Jump Menu