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Microsoft Windows Server Domain Name System (DNS) Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Primary authoritative name servers must be configured to only receive zone transfer requests from specified secondary name servers.

    <VulnDiscussion>Authoritative name servers (especially primary name servers) should be configured with an allow-transfer access control subst...
    Rule Medium Severity
  • SRG-APP-000516-DNS-000099

    <GroupDescription></GroupDescription>
    Group
  • The Windows DNS Servers zone database files must not be accessible for edit/write by users and/or processes other than the Windows DNS Server service account and/or the DNS database administrator.

    &lt;VulnDiscussion&gt;Discretionary Access Control (DAC) is based on the premise that individual users are "owners" of objects and therefore have d...
    Rule Medium Severity
  • SRG-APP-000516-DNS-000101

    <GroupDescription></GroupDescription>
    Group
  • The Windows DNS Server must implement internal/external role separation.

    &lt;VulnDiscussion&gt;DNS servers with an internal role only process name/address resolution requests from within the organization (i.e., internal ...
    Rule Medium Severity
  • SRG-APP-000516-DNS-000102

    <GroupDescription></GroupDescription>
    Group
  • The Windows DNS Server authoritative for local zones must only point root hints to the DNS servers that host the internal root domain.

    &lt;VulnDiscussion&gt;All caching name servers must be authoritative for the root zone because, without this starting point, they would have no kno...
    Rule Medium Severity
  • SRG-APP-000516-DNS-000113

    <GroupDescription></GroupDescription>
    Group
  • The Windows DNS Servers zone files must not include resource records that resolve to a fully qualified domain name residing in another zone.

    &lt;VulnDiscussion&gt;If a name server could claim authority for a resource record in a domain for which it was not authoritative, this would pose ...
    Rule Medium Severity
  • SRG-APP-000516-DNS-000114

    <GroupDescription></GroupDescription>
    Group
  • The Windows DNS Server's zone files must not include CNAME records pointing to a zone with lesser security for more than six months.

    &lt;VulnDiscussion&gt;The use of CNAME records for exercises, tests, or zone-spanning (pointing to zones with lesser security) aliases should be te...
    Rule Medium Severity
  • SRG-APP-000516-DNS-000500

    <GroupDescription></GroupDescription>
    Group
  • Nonroutable IPv6 link-local scope addresses must not be configured in any zone.

    &lt;VulnDiscussion&gt;IPv6 link-local scope addresses are not globally routable and must not be configured in any DNS zone. Like RFC1918 addresses,...
    Rule Medium Severity
  • SRG-APP-000516-DNS-000500

    <GroupDescription></GroupDescription>
    Group
  • AAAA addresses must not be configured in a zone for hosts that are not dual stack.

    &lt;VulnDiscussion&gt;DNS is only responsible for resolving a domain name to an IP address. Applications and operating systems are responsible for ...
    Rule Medium Severity
  • SRG-APP-000158-DNS-000015

    <GroupDescription></GroupDescription>
    Group
  • The Windows DNS Server must uniquely identify the other DNS server before responding to a server-to-server transaction.

    &lt;VulnDiscussion&gt;Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. This...
    Rule Medium Severity
  • SRG-APP-000394-DNS-000049

    <GroupDescription></GroupDescription>
    Group
  • The secondary Windows DNS name servers must cryptographically authenticate zone transfers from primary name servers.

    &lt;VulnDiscussion&gt;Authenticity of zone transfers within Windows Active Directory (AD)-integrated zones is accomplished by AD replication. Witho...
    Rule Medium Severity
  • SRG-APP-000001-DNS-000001

    <GroupDescription></GroupDescription>
    Group

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