Automatic Update of Trust Anchors must be enabled on key rollover.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-58675	WDNS-SC-000013	SV-73105r4_rule		Medium

Description
A trust anchor is a preconfigured public key associated with a specific zone. A validating DNS server must be configured with one or more trust anchors in order to perform validation. If the DNS server is running on a domain controller, trust anchors are stored in the forest directory partition in Active Directory Domain Services (AD DS) and can be replicated to all domain controllers in the forest. On standalone DNS servers, trust anchors are stored in a file named TrustAnchors.dns. A DNS server running Windows Server 2012 or Windows Server 2012 R2 also displays configured trust anchors in the DNS Manager console tree in the Trust Points container. Trust anchors can also be viewed by executing Windows PowerShell commands or Dnscmd.exe at a Windows command prompt.

Description

A trust anchor is a preconfigured public key associated with a specific zone. A validating DNS server must be configured with one or more trust anchors in order to perform validation. If the DNS server is running on a domain controller, trust anchors are stored in the forest directory partition in Active Directory Domain Services (AD DS) and can be replicated to all domain controllers in the forest. On standalone DNS servers, trust anchors are stored in a file named TrustAnchors.dns. A DNS server running Windows Server 2012 or Windows Server 2012 R2 also displays configured trust anchors in the DNS Manager console tree in the Trust Points container. Trust anchors can also be viewed by executing Windows PowerShell commands or Dnscmd.exe at a Windows command prompt.

STIG	Date
Microsoft Windows 2012 Server Domain Name System Security Technical Implementation Guide	2018-07-09

Details

Check Text ( C-59547r2_chk )
Note: This check is Not applicable for Windows 2012 DNS Servers that only host Active Directory integrated zones or for Windows 2012 DNS servers on a Classified network. Log on to the DNS server using the Domain Admin or Enterprise Admin account. If not automatically started, initialize the Server Manager window by clicking its icon from the bottom left corner of the screen. Once the Server Manager window is initialized, from the left pane, click to select the DNS category. From the right pane, under the SERVERS section, right-click the DNS server. From the context menu that appears, click DNS Manager. On the opened DNS Manager snap-in from the left pane, expand the server name and then expand Forward Lookup Zones. From the expanded list, click to select and then right-click the zone name. From the displayed context menu, click DNSSEC>>Properties. Click the KSK tab. For each KSK that is listed under Key signing keys (KSKs), click the KSK, click Edit, and in the Key Rollover section verify the "Enable automatic rollover" check box is selected. If the "Enable automatic rollover" check box is not selected for every KSK listed, this is a finding.

Check Text ( C-59547r2_chk )

Note: This check is Not applicable for Windows 2012 DNS Servers that only host Active Directory integrated zones or for Windows 2012 DNS servers on a Classified network.

Log on to the DNS server using the Domain Admin or Enterprise Admin account.

If not automatically started, initialize the Server Manager window by clicking its icon from the bottom left corner of the screen.

Once the Server Manager window is initialized, from the left pane, click to select the DNS category.

From the right pane, under the SERVERS section, right-click the DNS server.

From the context menu that appears, click DNS Manager.

On the opened DNS Manager snap-in from the left pane, expand the server name and then expand Forward Lookup Zones.

From the expanded list, click to select and then right-click the zone name.

From the displayed context menu, click DNSSEC>>Properties.

Click the KSK tab.

For each KSK that is listed under Key signing keys (KSKs), click the KSK, click Edit, and in the Key Rollover section verify the "Enable automatic rollover" check box is selected.

If the "Enable automatic rollover" check box is not selected for every KSK listed, this is a finding.

Fix Text (F-64059r1_fix)
Log on to the DNS server using the Domain Admin or Enterprise Admin account. If not automatically started, initialize the Server Manager window by clicking its icon from the bottom left corner of the screen. Once the Server Manager window is initialized, from the left pane, click to select the DNS category. From the right pane, under the SERVERS section, right-click the DNS server. From the context menu that appears, click DNS Manager. On the opened DNS Manager snap-in from the left pane, expand the server name and then expand Forward Lookup Zones. From the expanded list, click to select and then right-click the zone name. From the displayed context menu, click DNSSEC>>Properties. Click the KSK tab. For each KSK that is listed under Key signing keys (KSKs), click the KSK, click Edit, and in the Key Rollover section, select the "Enable automatic rollover" check box.

Fix Text (F-64059r1_fix)

Log on to the DNS server using the Domain Admin or Enterprise Admin account.

If not automatically started, initialize the Server Manager window by clicking its icon from the bottom left corner of the screen.

Once the Server Manager window is initialized, from the left pane, click to select the DNS category.

From the right pane, under the SERVERS section, right-click the DNS server.

From the context menu that appears, click DNS Manager.

On the opened DNS Manager snap-in from the left pane, expand the server name and then expand Forward Lookup Zones.

From the expanded list, click to select and then right-click the zone name.

From the displayed context menu, click DNSSEC>>Properties.

Click the KSK tab.

For each KSK that is listed under Key signing keys (KSKs), click the KSK, click Edit, and in the Key Rollover section, select the "Enable automatic rollover" check box.