III - Administrative Public
Rules and Groups employed by this XCCDF Profile
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SRG-APP-000516-DNS-000078
Group -
The Zone Signing Key (ZSK) rollover interval must be configured to less than two months.
An attacker that has compromised a ZSK can use that key only during the KSK's signature validity interval. An attacker that has compromised a KSK can use that key for only as long as the signature ...Rule Medium Severity -
SRG-APP-000516-DNS-000084
Group -
NSEC3 must be used for all internal DNS zones.
To ensure that RRs associated with a query are really missing in a zone file and have not been removed in transit, the DNSSEC mechanism provides a means for authenticating the nonexistence of an RR...Rule Medium Severity -
SRG-APP-000516-DNS-000085
Group -
The Infoblox system must ensure each NS record in a zone file points to an active name server authoritative for the domain specified in that record.
Poorly constructed NS records pose a security risk because they create conditions under which an adversary might be able to provide the missing authoritative name services that are improperly speci...Rule Medium Severity -
SRG-APP-000516-DNS-000087
Group -
All authoritative name servers for a zone must be located on different network segments.
Most enterprises have an authoritative primary server and a host of authoritative secondary name servers. It is essential that these authoritative name servers for an enterprise be located on diffe...Rule Medium Severity -
SRG-APP-000516-DNS-000089
Group -
An authoritative name server must be configured to enable DNSSEC Resource Records.
The specification for a digital signature mechanism in the context of the DNS infrastructure is in IETF's DNSSEC standard. In DNSSEC, trust in the public key (for signature verification) of the sou...Rule Medium Severity -
SRG-APP-000516-DNS-000090
Group -
Digital signature algorithm used for DNSSEC-enabled zones must be FIPS-compatible.
The choice of digital signature algorithm will be based on recommended algorithms in well-known standards. NIST's Digital Signature Standard (DSS) [FIPS186] provides three algorithm choices: * Digi...Rule High Severity -
SRG-APP-000516-DNS-000091
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.
Authoritative name servers for an enterprise may be configured to receive requests from both external and internal clients. External clients need to receive RRs that pertain only to public servic...Rule Medium Severity -
SRG-APP-000516-DNS-000092
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.
Instead of having the same set of authoritative name servers serve different types of clients, an enterprise could have two different sets of authoritative name servers. One set, called external ...Rule Medium Severity -
SRG-APP-000516-DNS-000093
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.
Instead of having the same set of authoritative name servers serve different types of clients, an enterprise could have two different sets of authoritative name servers. One set, called external ...Rule Medium Severity -
SRG-APP-000516-DNS-000099
Group -
The DNS implementation must enforce a Discretionary Access Control (DAC) policy that limits propagation of access rights.
Discretionary Access Control (DAC) is based on the premise that individual users are "owners" of objects and therefore have discretion over who should be authorized to access the object and in whic...Rule Medium Severity
Node 2
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