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The Windows DNS Server must provide its identity with returned DNS information by enabling DNSSEC and TSIG/SIG(0).


Finding ID Version Rule ID IA Controls Severity
V-259366 WDNS-22-000038 SV-259366r945275_rule Medium
Weakly bound credentials can be modified without invalidating the credential; therefore, nonrepudiation can be violated. This requirement supports audit requirements that provide organizational personnel with the means to identify who produced specific information in the event of an information transfer. Organizations and/or data owners determine and approve the strength of the binding between the information producer and the information based on the security category of the information and relevant risk factors. DNSSEC and TSIG/SIG(0) both use digital signatures to establish the identity of the producer of pieces of information.
Microsoft Windows Server Domain Name System (DNS) Security Technical Implementation Guide 2024-01-09


Check Text ( C-63105r945274_chk )
Note: This check is not applicable for Windows DNS Servers that host only Active Directory-integrated zones or for Windows DNS Servers on a classified network.

Validate this check from the Windows DNS Server being configured/reviewed.

Log on to the Windows DNS Server using the account designated as Administrator or DNS Administrator.

Determine a valid host in the zone.

Open the Windows PowerShell prompt on the Windows DNS Server being configured/reviewed.

Issue the following command:
(Replace www.zonename.mil with a FQDN of a valid host in the zone being validated. Replace ###.###.###.### with the FQDN or IP address of the Windows DNS Server hosting the signed zone.)

resolve-dnsname www.zonename.mil -server ###.###.###.### -dnssecok

Note: It is important to use the -server switch followed by the DNS server name/IP address.

The result should show the "A" record results.

In addition, the results should show QueryType: RRSIG with an expiration, date signed, signer, and signature, similar to the following:

Name: www.zonename.mil
QueryType: RRSIG
TTL: 189
Section: Answer
TypeCovered: CNAME
Algorithm: 8
LabelCount: 3
OriginalTtl: 300
Expiration: 11/21/2014 10:22:28 PM
Signed: 10/22/2014 10:22:28 PM
Signer: zonename.mil
Signature: {87, 232, 34, 134...}

Name: origin-www.zonename.mil
QueryType: A
TTL: 201
Section: Answer
IP4Address: ###.###.###.###

If the results do not show the RRSIG and signature information, this is a finding.
Fix Text (F-63013r939802_fix)
Sign or re-sign the hosted zone(s) on the DNS server being validated.

Log on to the DNS server using the account designated as Administrator or DNS Administrator.

In the DNS Manager console tree on the DNS server being validated, navigate to "Forward Lookup Zones".

Right-click the zone (repeat for each hosted zone), point to DNSSEC, and then click "Sign the Zone" using either saved parameters or custom parameters.