STIGQter: STIG Summary: Microsoft Windows Server 2016 Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 04 May 2021:

The directory service must be configured to terminate LDAP-based network connections to the directory server after 5 minutes of inactivity.

DISA Rule

SV-224979r569186_rule

Vulnerability Number

V-224979

Group Title

SRG-OS-000163-GPOS-00072

Rule Version

WN16-DC-000160

Severity

CAT III

CCI(s)

• CCI-001133 - The information system terminates the network connection associated with a communications session at the end of the session or after an organization-defined time period of inactivity.

Weight

10

Fix Recommendation

Configure the directory service to terminate LDAP-based network connections to the directory server after 5 minutes of inactivity.

Open an elevated "Command prompt" (run as administrator).

Enter "ntdsutil".

At the "ntdsutil:" prompt, enter "LDAP policies".

At the "ldap policy:" prompt, enter "connections".

At the "server connections:" prompt, enter "connect to server [host-name]" (where [host-name] is the computer name of the domain controller).

At the "server connections:" prompt, enter "q".

At the "ldap policy:" prompt, enter "Set MaxConnIdleTime to 300".

Enter "Commit Changes" to save.

Enter "Show values" to verify changes.

Enter "q" at the "ldap policy:" and "ntdsutil:" prompts to exit.

Check Contents

This applies to domain controllers. It is NA for other systems.

Open an elevated "Command Prompt" (run as administrator).

Enter "ntdsutil".

At the "ntdsutil:" prompt, enter "LDAP policies".

At the "ldap policy:" prompt, enter "connections".

At the "server connections:" prompt, enter "connect to server [host-name]"
(where [host-name] is the computer name of the domain controller).

At the "server connections:" prompt, enter "q".

At the "ldap policy:" prompt, enter "show values".

If the value for MaxConnIdleTime is greater than "300" (5 minutes) or is not specified, this is a finding.

Enter "q" at the "ldap policy:" and "ntdsutil:" prompts to exit.

Alternately, Dsquery can be used to display MaxConnIdleTime:

Open "Command Prompt (Admin)".
Enter the following command (on a single line).

dsquery * "cn=Default Query Policy,cn=Query-Policies,cn=Directory Service, cn=Windows NT,cn=Services,cn=Configuration,dc=[forest-name]" -attr LDAPAdminLimits

The quotes are required and dc=[forest-name] is the fully qualified LDAP name of the domain being reviewed (e.g., dc=disaost,dc=mil).

If the results do not specify a "MaxConnIdleTime" or it has a value greater than "300" (5 minutes), this is a finding.

Vulnerability Number

V-224979

Documentable

False

Rule Version

WN16-DC-000160

Severity Override Guidance

This applies to domain controllers. It is NA for other systems.

Open an elevated "Command Prompt" (run as administrator).

Enter "ntdsutil".

At the "ntdsutil:" prompt, enter "LDAP policies".

At the "ldap policy:" prompt, enter "connections".

At the "server connections:" prompt, enter "connect to server [host-name]"
(where [host-name] is the computer name of the domain controller).

At the "server connections:" prompt, enter "q".

At the "ldap policy:" prompt, enter "show values".

If the value for MaxConnIdleTime is greater than "300" (5 minutes) or is not specified, this is a finding.

Enter "q" at the "ldap policy:" and "ntdsutil:" prompts to exit.

Alternately, Dsquery can be used to display MaxConnIdleTime:

Open "Command Prompt (Admin)".
Enter the following command (on a single line).

dsquery * "cn=Default Query Policy,cn=Query-Policies,cn=Directory Service, cn=Windows NT,cn=Services,cn=Configuration,dc=[forest-name]" -attr LDAPAdminLimits

The quotes are required and dc=[forest-name] is the fully qualified LDAP name of the domain being reviewed (e.g., dc=disaost,dc=mil).

If the results do not specify a "MaxConnIdleTime" or it has a value greater than "300" (5 minutes), this is a finding.

Check Content Reference

M

Target Key

4205

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