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On a BIND 9.x server, 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.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-272379BIND-9X-001220SV-272379r1124035_ruleCCI-000366medium
Description
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 services (public web server, mail server, etc.). Internal clients need to receive RRs pertaining to public services as well as internal hosts. The zone information that serves the RRs on both the inside and outside of a firewall must be split into different physical files for these two types of clients (one file for external clients and one file for internal clients).
STIGDate
BIND 9.x Security Technical Implementation Guide2026-02-25

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (8) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CFG-01Configuration Management Program
1.00
END-01Endpoint Device Management (EDM)
1.00
END-04Malicious Code Protection (Anti-Malware)
1.00
END-06Endpoint File Integrity Monitoring (FIM)
1.00
MON-01Continuous Monitoring
1.00
MON-01.7File Integrity Monitoring (FIM)
1.00
CFG-02Secure Baseline Configurations
0.50
CFG-02.7Approved Configuration Deviations
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (100) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-12Session Termination
1.00
AC-16(1)Dynamic Attribute Association
1.00
AC-17(1)Monitoring and Control
1.00
AC-2Account Management
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(11)Usage Conditions
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00
AC-24(1)Transmit Access Authorization Information
1.00
AC-25Reference Monitor
1.00

+90 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.4.1
1.00
3.4.2
1.00
CCI1 mapping
CCI-000366
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (5) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

DE.CM-09
1.00
PR.PS-01
1.00
PR.DS-10
0.50
PR.PSPlatform Security
0.50
PR.PS-05
0.50

Who does this work

10 NICE work roles and 9 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-272379r1124035_chk)

If the BIND 9.x name server is not configured for split DNS, this is not applicable. Verify that the BIND 9.x server is configured to use separate views and address space for internal and external DNS operations when operating in a split configuration. Inspect the "named.conf" file for the following: view "internal" { match-clients { <ip_address> | <address_match_list> }; zone "example.com" { type Primary; file "internals.example.com"; }; }; view "external" { match-clients { <ip_address> | <address_match_list> }; zone "example.com" { type Primary; file "externals.db.example.com"; allow-transfer { Secondarys; }; }; }; If the internal and external view statements are configured to use the same zone file, this is a finding. Inspect the zone file defined in the internal and external view statements. If any resource record is listed in both the internal and external zone files, this is a finding.

Fix Text (F-76336r1123865_fix)

Edit the "named.conf" file. Configure the internal and external view statements to use separate zone files. Edit the internal and external zone files. Configure the zone file to use RRs designated for internal or external use. The zone files must not share any RR.