# Reverse zone network details should be retrievable

Detailed information about networks with reverse lookup zones enables:

Source: https://maester.dev/docs/tests/AD-DNS-19

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<div class="test-byline"><div class="test-byline-avatars"><a class="test-byline-avatar test-byline-avatar--author" href="/contributors/soulemike" title="Michael Soule · Original author"><img src="https://github.com/soulemike.png" alt="Michael Soule" width="28" height="28" loading="lazy" decoding="async" /></a></div><div class="test-byline-meta"><span class="test-byline-text">Contributed by <a href="/contributors/soulemike">Michael Soule</a></span><a class="test-byline-link" href="/contributors">All contributors →</a></div></div>

<p class="test-part">Part of <a href="/docs/tests/ad">Active Directory</a> · Active Directory · DNS · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId AD-DNS-19
```

## Overview

Detailed information about networks with reverse lookup zones enables:

- **Network inventory**: Complete list of networks with reverse DNS
- **Security auditing**: Verification that only authorized networks are configured
- **Troubleshooting**: Quick identification of reverse DNS coverage
- **Documentation**: Accurate records of DNS infrastructure

Understanding which networks have reverse zones is essential for comprehensive DNS management.

#### Control Type

**Operational**

#### Security Recommendation

Review reverse zone network details regularly:
- Verify all listed networks are authorized
- Ensure CIDR notation is appropriate for each network
- Document the purpose of each reverse zone
- Remove reverse zones for decommissioned networks

#### How the Test Works

This test provides detailed information about each network with a reverse lookup zone, including:
- Network address
- CIDR notation
- Reverse zone name
- Zone type

#### Related Tests

- `Test-MtAdDnsReverseZoneCount` - Counts reverse lookup zones
- `Test-MtAdDnsReverseZoneNetworkCount` - Counts distinct networks

## Details

<details>
<summary>Every attribute of this check</summary>

| Field | Value |
| --- | --- |
| Test ID | AD-DNS-19 |
| Severity | Info |
| Suite | Active Directory |
| Product | Active Directory |
| Feature | DNS |
| Area | Infrastructure hardening |
| Resource type | DnsZone |
| MITRE ATT&CK | None |
| PowerShell test | [Test-MtAdDnsReverseZoneNetworkDetails](https://github.com/maester365/maester/blob/main/tests/ad/dns/Test.AD-DNS-19.ps1) |
| Services | ActiveDirectory |
| Permissions | ActiveDirectory:Remoting:Microsoft.PowerShell, ActiveDirectory:Cim:root\MicrosoftDNS:MicrosoftDNS_Zone:Read, ActiveDirectory:Cim:root\MicrosoftDNS:MicrosoftDNS_ResourceRecord:Read, ActiveDirectory:Cim:root\MicrosoftDNS:MicrosoftDNS_RootHints:Read |

</details>

## Source

- Test: [`tests/ad/dns/Test.AD-DNS-19.ps1`](https://github.com/maester365/maester/blob/main/tests/ad/dns/Test.AD-DNS-19.ps1)
- Documentation: [`tests/ad/dns/Test.AD-DNS-19.md`](https://github.com/maester365/maester/blob/main/tests/ad/dns/Test.AD-DNS-19.md)