Infoblox 7.x DNS Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-APP-000516-DNS-000091
<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-DNS-000092
<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-DNS-000093
<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-DNS-000099
<GroupDescription></GroupDescription>Group -
The DNS implementation must implement internal/external role separation.
<VulnDiscussion>DNS servers with an internal role only process name/address resolution requests from within the organization (i.e., internal ...Rule Medium Severity -
The DNS implementation must enforce a Discretionary Access Control (DAC) policy that limits propagation of access rights.
<VulnDiscussion>Discretionary Access Control (DAC) is based on the premise that individual users are "owners" of objects and therefore have d...Rule Medium Severity -
The platform on which the name server software is hosted must be configured to send outgoing DNS messages from a random port.
<VulnDiscussion>OS configuration practices as issued by the US Computer Emergency Response Team (US CERT) and the National Institute of Stand...Rule Medium Severity
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