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XCCDF
Domain Name System (DNS) Security Requirements Guide
SRG-APP-000516
The IP address for hidden master authoritative name servers must not appear in the name servers set in the zone database.
The IP address for hidden master authoritative name servers must not appear in the name servers set in the zone database.
An XCCDF Rule
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The IP address for hidden master authoritative name servers must not appear in the name servers set in the zone database.
Medium Severity
<VulnDiscussion>A hidden master authoritative server is an authoritative DNS server whose IP address does not appear in the name server set for a zone. All of the name servers that do appear in the zone database as designated name servers get their zone data from the hidden master via a zone transfer request. In effect, all visible name servers are actually secondary slave servers. This prevents potential attackers from targeting the master name server because its IP address may not appear in the zone database.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>