I - Mission Critical Classified
Rules and Groups employed by this XCCDF Profile
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SRG-APP-000516
<GroupDescription></GroupDescription>Group -
The DNS implementation must ensure each NS record in a zone file points to an active name server authoritative for the domain specified in that record.
<VulnDiscussion>Poorly constructed NS records pose a security risk because they create conditions under which an adversary might be able to p...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
The two files generated by the dnssec-keygen program must be made accessible only to the server administrator account, or deleted, after they have been copied to the key file in the name server.
<VulnDiscussion>To enable zone transfer (requests and responses) through authenticated messages, it is necessary to generate a key for every ...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
All authoritative name servers for a zone must be located on different network segments.
<VulnDiscussion>Most enterprises have an authoritative primary server and a host of authoritative secondary name servers. It is essential tha...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
All authoritative name servers for a zone must have the same version of zone information.
<VulnDiscussion>The only protection approach for content control of DNS zone file is the use of a zone file integrity checker. The effectiven...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
An authoritative name server must be configured to enable DNSSEC Resource Records.
<VulnDiscussion>The specification for a digital signature mechanism in the context of the DNS infrastructure is in IETF's DNSSEC standard. I...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
Digital signature algorithm used for DNSSEC-enabled zones must be FIPS-compatible.
<VulnDiscussion>The choice of digital signature algorithm will be based on recommended algorithms in well-known standards. NIST's Digital Sig...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
For zones split between the external and internal sides of a network, the RRs for the external hosts must be separate from the RRs for the internal hosts.
<VulnDiscussion>Authoritative name servers for an enterprise may be configured to receive requests from both external and internal clients. ...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
In a split DNS configuration, where separate name servers are used between the external and internal networks, the external name server must be configured to not be reachable from inside resolvers.
<VulnDiscussion>Instead of having the same set of authoritative name servers serve different types of clients, an enterprise could have two d...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
In a split DNS configuration, where separate name servers are used between the external and internal networks, the internal name server must be configured to not be reachable from outside resolvers.
<VulnDiscussion>Instead of having the same set of authoritative name servers serve different types of clients, an enterprise could have two d...Rule Medium Severity -
SRG-APP-000516
<GroupDescription></GroupDescription>Group -
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
Node 2
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