What does Windows error code 9103 (DNS_ERROR_NSEC3_INCOMPATIBLE_WITH_RSA_SHA1) mean?

 
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DNS_ERROR_NOT_ALLOWED_ON_SIGNED_ZONE DNS_ERROR_NOT_ENOUGH_SIGNING_KEY_DESCRIPTORS

DNS_ERROR_NSEC3_INCOMPATIBLE_WITH_RSA_SHA1

DNS_ERROR_NSEC3_INCOMPATIBLE_WITH_RSA_SHA1 identifies an invalid DNSSEC combination: the zone is configured to use NSEC3 while a signing key uses the RSA/SHA-1 algorithm. Windows DNS Server treats these settings as incompatible.

What to check

  • Review every KSK and ZSK in the zone, not only the key being added.
  • Choose a compatible authenticated-denial-of-existence method and signing algorithm before changing the zone configuration.
  • Validate the planned settings before applying them to the production zone.
Get-DnsServerSigningKey -ZoneName "example.com"

Microsoft: Sign DNS zones with DNSSEC

Microsoft: Test-DnsServerDnsSecZoneSetting

Microsoft: Add-DnsServerSigningKey


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