AD-CFG-11: Registered DHCP servers count should be retrievable
| ID | AD-CFG-11 |
| Severity | Info |
| Suite | Active Directory (on-premises) |
| Product | Active Directory |
| Feature | Directory configuration |
| Security area | Infrastructure hardening |
| Resource type | Tenant |
| Reads from | On-premises Active Directory |
What this checks and how to fix it
Section titled “What this checks and how to fix it”DHCP servers registered in Active Directory are authorized to provide IP addresses to clients. If unauthorized DHCP servers are registered (or legitimate servers are removed), clients may receive incorrect network settings, experience instability, or be exposed to man-in-the-middle attacks via rogue DHCP.
Control Type
Section titled “Control Type”Operational
Security Recommendation
Section titled “Security Recommendation”- Maintain a strict allowlist of approved DHCP servers and ensure only those servers are registered in AD.
- Remove stale/unneeded DHCP server registrations as part of routine hygiene.
- Restrict permissions for DHCP registration operations to only the DHCP administrators and automation workflows you trust.
- Alert on any change in the number of registered DHCP servers.
How the Test Works
Section titled “How the Test Works”- Searches Active Directory for directory objects representing authorized/registered DHCP servers.
- Counts the number of such registered server objects.
- Compares the count to an environment baseline and flags unexpected additions/removals.
Related Tests
Section titled “Related Tests”Test-MtAdWellKnownSecurityPrincipalsCount: Helps confirm AD identity integrity.Test-MtAdEnterpriseCaCount: Complements service authorization checks for certificate infrastructure.
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