STIGQter STIGQter: STIG Summary: Infoblox 8.x DNS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 09 Jan 2021:

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.

DISA Rule

SV-233869r621666_rule

Vulnerability Number

V-233869

Group Title

SRG-APP-000516-DNS-000092

Rule Version

IDNS-8X-400011

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

1. Navigate to Data Management >> DNS >> Members tab.
2. Select the Grid member identified as running the DNS service and click "Edit".
3. Enable and configure either an Access Control List (ACL) or set of Access Control Entries (ACE).
4. When complete, click "Save & Close" to save the changes and exit the "Properties" screen.
5. Perform a service restart if necessary.

Check Contents

Validation of this configuration item requires review of the network architecture and security configuration in addition to DNS server configuration to verify that external name servers are not accessible from the internal network when a split DNS configuration is implemented.

1. Navigate to Data Management >> DNS >> Members tab.
2. Review the network configuration and access control of each Infoblox member that has the DNS service running.
3. Select each grid member and click "Edit". Review the "Queries" tab to verify that both queries and recursion options are enabled and allowed only from the respective client networks.

If a split DNS configuration is not used, this is not a finding.

If there is no access control configured or access control does not restrict queries and recursion to the respective client network, this is a finding.

Vulnerability Number

V-233869

Documentable

False

Rule Version

IDNS-8X-400011

Severity Override Guidance

Validation of this configuration item requires review of the network architecture and security configuration in addition to DNS server configuration to verify that external name servers are not accessible from the internal network when a split DNS configuration is implemented.

1. Navigate to Data Management >> DNS >> Members tab.
2. Review the network configuration and access control of each Infoblox member that has the DNS service running.
3. Select each grid member and click "Edit". Review the "Queries" tab to verify that both queries and recursion options are enabled and allowed only from the respective client networks.

If a split DNS configuration is not used, this is not a finding.

If there is no access control configured or access control does not restrict queries and recursion to the respective client network, this is a finding.

Check Content Reference

M

Target Key

5251

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