New-SmbSpnAuditPlan

Business Value

The New-SmbSpnAuditPlan command provides a way to identify potential issues with ServicePrincipalName (SPN) registrations in Active Directory. This is particularly useful for organizations that rely heavily on Windows-based systems and have complex SPN configurations.

• Potential business benefits:
  • Reduce the risk of authentication failures due to incorrect or missing SPNs
  • Improve security by ensuring that only authorized services are registered with specific SPNs
  • Simplify troubleshooting and auditing of SPN-related issues

Who Uses This

The New-SmbSpnAuditPlan command is typically used by:

• System administrators responsible for managing Windows-based systems and Active Directory
• Security teams tasked with auditing and monitoring system configurations
• Compliance officers who need to ensure that system configurations meet regulatory requirements

Risks

Failure to properly manage SPNs can result in:

• Authentication failures due to incorrect or missing SPNs
• Security vulnerabilities if unauthorized services are registered with specific SPNs
• Non-compliance with regulatory requirements if SPN configurations are not properly documented and audited

When a Manager Cares

A manager should be concerned about the output of New-SmbSpnAuditPlan when:

• Authentication failures occur due to incorrect or missing SPNs
• Security audits identify potential vulnerabilities related to SPN configurations
• Compliance requirements indicate that system configurations need to be updated to meet regulatory standards

Day-to-Day Use

To use the New-SmbSpnAuditPlan command, follow these steps:

1. Run Get-SmbSpnCandidate to retrieve a list of expected SPNs for the current machine account.
2. Run New-SmbSpnAuditPlan with the output from step 1 as input.
3. Review the audit plan output to identify any missing or orphaned SPNs.

Example code:

$expectedSPNs = Get-SmbSpnCandidate -TargetComputer $env:COMPUTERNAME
(New-SmbSpnAuditPlan -Candidate $expectedSPNs).MissingSpns | Format-Table -AutoSize

Common Patterns and Code Examples

• Use Get-SmbSpnCandidate to retrieve a list of expected SPNs for the current machine account.
• Use New-SmbSpnAuditPlan with the output from Get-SmbSpnCandidate as input.

Watchpoints:

• Ensure that the machine account’s ServicePrincipalName attribute is properly configured in Active Directory.
• Regularly run Get-SmbSpnCandidate and New-SmbSpnAuditPlan to identify any changes or issues with SPN configurations.

What This Does

The New-SmbSpnAuditPlan command compares the expected SPNs for the current machine account with the actual SPNs registered in Active Directory. It identifies any missing or orphaned SPNs and provides a plan for updating the system configuration to meet regulatory requirements.

Step-by-Step Recipe:

1. Run Get-SmbSpnCandidate to retrieve a list of expected SPNs for the current machine account.
2. Run New-SmbSpnAuditPlan with the output from step 1 as input.
3. Review the audit plan output to identify any missing or orphaned SPNs.

What to Do When Stuck:

• Consult the documentation for Get-SmbSpnCandidate and New-SmbSpnAuditPlan.
• Reach out to a system administrator or security expert for assistance.

Licence terms are proprietary and are supplied with the purchase, subscription or evaluation agreement. No open-source licence is granted.

The New-SmbSpnAuditPlan command helps organizations meet regulatory requirements related to SPN configurations. It:

• Identifies any missing or orphaned SPNs, reducing the risk of authentication failures.
• Ensures that only authorized services are registered with specific SPNs, improving security.
• Provides a plan for updating the system configuration to meet regulatory standards.

Data-handling and transit requirements:

• The command reads the machine account’s ServicePrincipalName attribute from Active Directory.
• It uses the output from Get-SmbSpnCandidate as input, which retrieves a list of expected SPNs for the current machine account.

At-rest requirements:

• The command stores the audit plan output in memory and does not write any data to disk.

Audit trail:

• The command provides a detailed audit plan output that includes information about missing or orphaned SPNs.
• Organizations should regularly review this output to ensure compliance with regulatory requirements.