Always On VPN DPC 5.2.0 Now Available

I’m pleased to announce that Always On VPN Dynamic Profile Configurator (DPC) version 5.2.0 is now available. My good friend Leo D’Arcy has been hard at work for the last few months squashing some bugs and adding a few new features to DPC. If you are running a previous release of Always On VPN DPC, either open source or commercial, it’s time to upgrade.

Important!! DPC 5.2.0 has a bug that prevents the service from stopping. This has been addressed in DPC 5.2.1. Guidance for upgrading from DPC 5.2.0 to 5.2.1 can be found here.

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What’s New in DPC 5.2.0

Always On VPN DPC 5.2.0 has some compelling new features.

  • Exclude Routes from DNS – DPC has a feature that allows administrators to add routes to the routing table using DNS. When this setting is enabled, DPC will attempt to resolve the specified hostname to an IP address and add it to the VPN’s routing table when creating the profile. With 5.2.0, this capability has been extended to exclusion routes, allowing administrators to exclude resources by host name.
  • Write Event Logs to Disk – This setting allows administrators to optionally write DPC event information to a text file in addition to logging them in the event log. Writing event log information to a text file on disk can make troubleshooting easier in some scenarios.
  • Delay Profile Updates – This new feature ensures reliable VPN profile creation after group policy updates take place.

Bug Fixes

In addition to new capabilities, Always On VPN DPC 5.2.0 includes fixes for many outstanding issues.

  • DPC name resolution issue where duplicate IP addresses are returned, resulting in failed route additions when using ‘Allow Routes from DNS’.
  • Missing events in the DPC operational event log.
  • Enabling ‘Disable Disconnect Button’ or ‘Disable Advanced Edit Button’ settings results in a profile mismatch warning.
  • Added resiliency to DPC name resolution when one or more name resolution requests fail.

Group Policy Template

As a reminder, any time there are new features in DPC, there will be corresponding changes to Group Policy administrative template and template language files. Be sure to update your ADMX and ADML files in the group policy central store to take advantage of these new capabilities in DPC 5.2.0.

Recommendation

If you are running any release of Always On VPN DPC, commercial or open source, consider upgrading now to gain access to new features and operational reliability improvements. You can find DPC v5.2.0 on GitHub here.

Additional Information

Always On VPN DPC v5.2.0 Available Now

Always On VPN Dynamic Profile Configurator (DPC)

Always On VPN DPC Now Open Source

Migrating from Always On VPN DPC Commercial to Open Source

Always On VPN DPC with Microsoft Intune

Microsoft Always On VPN on Discord

Always On VPN DPC

Always On VPN Security Updates July 2025

Patch Tuesday has arrived, and, unlike last month, it’s a busy month for Always On VPN administrators. The June 2025 Microsoft security updates address a whopping 16 (!) vulnerabilities in the Windows Routing and Remote Access Service (RRAS). Notably, DirectAccess administrators are once again impacted by a critical vulnerability in the Windows KDC Proxy Service (KPSSVC) this month.

RRAS

As stated previously, this month’s update addresses 16 unique CVEs in Windows Server RRAS. All are memory-related buffer overflows and out-of-bounds reads, indicating that a security researcher was recently probing for vulnerabilities in RRAS.

While all the above CVEs are Remote Code Execution (RCE) and Information Disclosure vulnerabilities, none are rated as Critical; all are rated as Important. This means exploitation is unlikely, but administrators are encouraged to update as soon as possible.

KDC Proxy

This month’s security update includes another Critical RCE in the Windows KDC Proxy Service (KPSSVC).

The KDC Proxy is enabled by default when DirectAccess is configured. By design, this means the service is exposed to the public Internet, posing a significant risk to organizations using DirectAccess for secure remote access. Administrators are urged to update their systems immediately to avoid compromise.

Additional Information

Microsoft July 2025 Security Updates

Always On VPN Security Updates May 2025

Once again, it’s the second Tuesday of the month, and Microsoft has published its monthly security updates for May 2025. Once again, this month includes many updates for the Windows Server Routing and Remote Access Service (RRAS) and an update for Active Directory Certificate Services (AD CS).

RRAS Updates

The Microsoft security updates for May 2025 address the following CVEs for Windows Server RRAS.

All the reported vulnerabilities in RRAS this month are information disclosure vulnerabilities, with exploitation unlikely. Most appear to be memory-related (null pointer references, out-of-bounds reads, etc.). None are Remote Code Execution (RCE) vulnerabilities, and none are rated Critical.

AD CS Update

This month’s update release also includes a single CVE addressing a denial of service (DoS) vulnerability in AD CS.

Additional Information

Microsoft May 2025 Security Updates