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The platform on which the name server software is hosted must be configured to respond to DNS traffic only.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-265985F5BI-DN-300016SV-265985r1024493_ruleCCI-000366medium
Description
Hosts that run the name server software must not provide any other services and therefore must be configured to respond to DNS traffic only. In other words, the only allowed incoming ports/protocols to these hosts must be 53/udp and 53/tcp. Outgoing DNS messages must be sent from a random port to minimize the risk of an attacker's guessing the outgoing message port and sending forged replies. BIG-IP is often used to proxy DNS along with other services. The requirement speaks to the "name server software", but if we are proxying for the name server then we do not need to limit listeners to DNS only.
STIGDate
F5 BIG-IP TMOS DNS Security Technical Implementation Guide2024-09-09

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-265985r1024493_chk)

If the BIG-IP does not have the role of authoritative DNS server, this is not applicable. From the BIG-IP GUI: 1. Local Traffic. 2. Virtual Servers. 3. Verify the list of virtual servers are not configured to listen for non-DNS services. If the BIG-IP appliance is configured to respond traffic other than DNS, this is a finding.

Fix Text (F-69811r1023211_fix)

From the BIG-IP GUI: 1. Local Traffic. 2. Virtual Servers. 3. For any virtual servers listening that are not associated with DNS, check the box next to the virtual server and click "Delete". 4. Click "Delete" again.