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Microsoft Entra Private Access has officially launched its Private DNS service, enabling organizations to streamline domain management and enhance security. This feature allows administrators to add domain suffixes to the Quick Access configuration, automatically updating traffic forwarding profiles for connected clients.
Key Features:
- Automatic DNS Updates: DNS queries for FQDNs matching configured suffixes are forwarded to the DNS proxy at a Global Secure Access (GSA) edge.
- Single-Label Domain (SLD) Resolution: Resolves names without requiring a full domain suffix.
- Seamless SSO Integration: Works alongside Single Sign-On for secure access.
Relevant Links:
You Should Know: Essential Commands and Configurations
1. Verify DNS Resolution on Windows
Check if a domain resolves correctly using:
Resolve-DnsName -Name "yourdomain.internal" -Server 10.0.0.1
2. Linux DNS Query Testing
Use `dig` or `nslookup` to verify Private DNS resolution:
dig yourdomain.internal @private-dns-ip
nslookup yourdomain.internal private-dns-ip
3. Configure DNS Suffixes in Windows
Add a DNS suffix via PowerShell:
Set-DnsClientGlobalSetting -SuffixSearchList @("internal.yourcompany.com")
4. Check DNS Proxy Status in Entra
Ensure the DNS proxy is active:
Get-MgDirectorySetting -DirectorySettingId "dns-proxy-config"
5. Troubleshooting DNS Forwarding
Check forwarding rules on a Linux-based DNS proxy:
journalctl -u systemd-resolved --no-pager | grep "forwarded"
6. Secure DNS with DNSSEC
Enable DNSSEC validation on Linux:
sudo systemd-resolve --set-dnssec=allow-downgrade
7. Log DNS Queries for Auditing
Capture DNS traffic with `tcpdump`:
sudo tcpdump -i eth0 port 53 -w dns_queries.pcap
8. Automate DNS Updates via API
Use Microsoft Graph API to manage DNS settings:
curl -X PATCH "https://graph.microsoft.com/v1.0/network/dnsForwardingRules" -H "Authorization: Bearer $TOKEN" -d '{"rules": [{"domain": "internal.yourcompany.com", "forwarders": ["10.0.0.1"]}]}'
What Undercode Say
Private DNS in Entra Private Access simplifies secure name resolution while integrating with Zero Trust principles. Organizations should:
– Enforce DNSSEC to prevent spoofing.
– Monitor DNS logs for anomalies.
– Automate configurations via APIs to reduce human error.
– Test failover scenarios to ensure high availability.
Expected Output:
A robust, secure DNS infrastructure that enhances visibility and control over internal and external name resolution while maintaining compliance with modern security frameworks.
Prediction
As hybrid work grows, demand for seamless, secure DNS solutions like Entra Private Access will surge, pushing more enterprises to adopt Zero Trust DNS architectures.
References:
Reported By: Markolauren Private – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
