AD-DNS-08: Zone delegation count should be retrievable
| ID | AD-DNS-08 |
| Severity | Info |
| Suite | Active Directory (on-premises) |
| Product | Active Directory |
| Feature | DNS |
| Security area | Infrastructure hardening |
| Resource type | DnsZone |
| Reads from | On-premises Active Directory |
What this checks and how to fix it
Section titled “What this checks and how to fix it”DNS zone delegations transfer authority for a subdomain to different name servers. Monitoring delegations is important because:
- Security boundaries: Delegations may cross administrative or security boundaries
- External dependencies: Delegations may point to external/untrusted servers
- Configuration complexity: Each delegation adds management overhead
- Potential hijacking: Unauthorized delegations could redirect traffic
Control Type
Section titled “Control Type”Operational
Security Recommendation
Section titled “Security Recommendation”- Audit all zone delegations regularly
- Verify delegated servers are under your organization’s control
- Document the purpose of each delegation
- Monitor for unauthorized delegation changes
How the Test Works
Section titled “How the Test Works”This test counts NS records that represent delegations (where the record name is not “@”), indicating authority delegation to another server.
Related Tests
Section titled “Related Tests”Test-MtAdDnsZoneDelegationDetails- Provides detailed delegation information
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