Always On VPN ProfileXML Editing and Formatting with Visual Studio Code

Always On VPN ProfileXML Editing and Formatting with Visual Studio CodeWindows 10 Always On VPN is designed to be implemented and managed using a Mobile Device Management (MDM) platform such as Microsoft Intune. With Intune specifically, there is an option to configure an Always On VPN profile in the UI. However, it provides only limited support and does not include all settings and options required for many deployments. Crucially, IKEv2 advanced security settings cannot be configured using the Intune portal. Also, there is currently no option for configuring a device tunnel with Intune. In these scenarios the administrator must manually create a ProfileXML file and provision it using Intune, System Center Configuration Manager (SCCM), or PowerShell.

ProfileXML

ProfileXML includes all settings that define the Always On VPN connection. The options and settings available are documented in the VPNv2 Configuration Service Provider (CSP) reference on Microsoft’s web site. ProfileXML is formatted using elements and settings within those elements. The formatting and syntax are critical to ensuring proper operation. Any error in syntax or formatting can result in an error, such as those described here.

XML Readability

Formatting is also important for readability, which is often helpful when reviewing configuration settings or troubleshooting syntax errors. For example, an element may be defined correctly but may be nested wrong. Often XML files are created with all text being left-justified, or with everything on a single line, making the content difficult to read. Using a file editor that recognizes XML files can be beneficial.

Visual Studio Code

To create, edit, and review ProfileXML it is recommended that a proper editing tool be used. I recommend using Microsoft’s Visual Studio Code. It is free, and it is especially helpful when editing XML files. Visual Studio Code can be downloaded here.

XML Tools VS Code Plug-In

To further enhance Visual Studio Code’s XML editing and formatting capabilities I recommend installing the XML Tools plug-in. This tool extends the native features of VS code for handling XML files. One important thing it adds is a formatting feature that will make your ProfileXML much easier to manage. The XML Tools plug-in for VS Code can be downloaded here.

XML Formatting

Once the XML Tools plug-in for VS code has been installed, formatting XML for readability is straightforward. Simply right-click anywhere in the document and choose Format Document.

Always On VPN ProfileXML Editing and Formatting with Visual Studio CodeOnce complete, the XML document will be formatted with proper indenting and nesting of elements, as shown here.

Always On VPN ProfileXML Editing and Formatting with Visual Studio CodeSummary

Formatting and syntax must be strictly adhered to when creating a ProfileXML file for Windows 10 Always On VPN. Using Visual Studio Code with the XML Tools plug-in allow the administrator to create and edit XML with proper formatting, which greatly improves readability and allows for streamlined configuration review and troubleshooting.

Acknowledgements

Special thanks to Colin, an avid reader of the articles on this web site for this tip. Thanks, Colin! 🙂

Additional Information

Always On VPN and DirectAccess Scripts and Sample Files on GitHub

Always On VPN IKEv2 Security Configuration

Always On VPN Device Tunnel Step-by-Step Configuration using PowerShell

Always On VPN Hands-On Training Classes in 2019

Always On VPN Unable to Create Profile General Error

Always On VPN Unable to Create Profile General ErrorWhen configuring a Windows 10 Always On VPN profile connection using the Microsoft-provided MakeProfile.ps1 PowerShell script or my PowerShell Always On VPN deployment script, the creation of a new connection may fail and the administrator may encounter the following error message.

Unable to create [connection name] profile: A general error occurred that is not covered by a more specific error code.

Always On VPN Unable to Create Profile General Error

This error message is, of course, terribly ambiguous and provides no real actionable information for the administrator to resolve the problem with. This makes troubleshooting this error somewhat challenging.

Probable Cause

In my experience, this error message is almost always related to a syntax error in ProfileXML. For example, to generate the error message above, my XML file included the following error.

Always On VPN Unable to Create Profile General Error

In this example, the setting should be True or False. The setting “foo” is unrecognized and causes the ambiguous error message. It can also happen if mutually exclusive configuration settings are defined. For example, it can occur if the DisableClassBasedDefaultRoutes element is set to true when the RoutingPolicyType element is set to ForceTunneling.

Error Resolution

The only way to resolve this error is to ensure there are no configuration errors for any defined elements in ProfileXML. Review the file carefully for errors such as typos or elements that are out of place. Refer to the VPNv2 Configuration Service Provider (CSP) ProfileXML XSD for detailed syntax examples. In addition, I have some sample ProfileXML configuration files that can be used for reference on my GitHub page.

XML Format Validation

To ensure ProfileXML is properly formatted, it is recommended that an XML editor be used when generating or editing the configuration file. This will ensure that all defined elements are well-formed, and that all tags are properly closed. Use caution though, because some XML editors (including some popular online formatting tools) will insert XML version and encoding information at the beginning of the file. This information must be removed from ProfileXML prior to deployment.

Additional Information

Windows 10 VPNv2 Configuration Service Provider (CSP) Reference

Windows 10 VPNv2 Configuration Service Provider (CSP) ProfileXML XSD Native Profile Examples

Windows 10 Always On VPN PowerShell Scripts and Sample ProfileXML Configuration Files on GitHub

Free Online XML Formatter

Windows 10 Always On VPN Hands-On Training Classes for 2019

Always On VPN and DirectAccess Scripts and Sample Files on GitHub

Always On VPN and DirectAccess Scripts and Sample Files on GitHubIf you’re looking for specialized configuration scripts for Windows 10 Always On VPN, Windows Server Routing and Remote Access Service (RRAS), or DirectAccess then have a look at my GitHub page! There I’ve uploaded a few tools I’ve created (with the help of my good friend Jeff Hicks!) along with some sample ProfileXML files. Here’s a sample of what you’ll find there today.

Always On VPN

This repository includes PowerShell scripts and sample ProfileXML files used for configuring Windows 10 Always On VPN. These scripts have been adopted from those provided by Microsoft and modified to work with a separate XML file. These scripts can be used for local testing and for deploying Always On VPN connections using System Center Configuration Manager (SCCM). The ProfileXML files can be helpful for those administrators looking for real world configuration examples.

https://github.com/richardhicks/aovpn

SstpOffload

This repository includes a PowerShell script to enable TLS offload for Windows Server RRAS Secure Socket Tunneling Protocol (SSTP) VPN connections when the public SSL certificate can’t be installed on the RRAS server. TLS offload for SSTP can be enabled in scenarios where better security, performance, and scalability are desired.

https://github.com/richardhicks/sstpoffload

DirectAccess

This repository includes the PowerShell script Move-DaInboxAccountingDatabase which can be used to move the DirectAccess inbox accounting database files. The default location of the database files is on the C: drive, and many administrators have encountered disk space issues, especially in large scale deployments. This script will relocate the database files to the location of your choice.

https://github.com/richardhicks/directaccess

More to Come!

Be sure to check my GitHub site for more PowerShell script and sample files on a regular basis. Or better yet, give me a follow! I’ll be sure to post more as time goes on. In addition, I’ll be going through my older articles where I’ve provided PowerShell code samples and will include them in the repository too.

Standard Disclaimer

All the sample files and PowerShell scripts I’ve shared on GitHub are provided as-is. Although they’ve been thoroughly tested, I can’t be certain I’ve accommodated every deployment scenario. Please use caution when running these scripts on production machines.

Additional Information

Always On VPN Hands-On Training Classes 2019

Jeff Hicks’ Blog

Always On VPN IKEv2 and SSTP Fallback

Always On VPN IKEv2 and SSTP FallbackA while back I wrote about the various VPN protocols supported for Windows 10 Always On VPN. The two most common are Internet Key Exchange version 2 (IKEv2) and Secure Socket Tunneling Protocol (SSTP). The article covers in detail each protocol’s advantages and disadvantages. To summarize, IKEv2 provides the best security (when configured correctly!) and SSTP is firewall-friendly ensuring ubiquitous access. Ideally an Always On VPN connection will attempt to use the more secure IKEv2 first, then fallback to SSTP only when IKEv2 is unavailable. Unfortunately, Always On VPN connections do not work this way today.

IKEv2 and SSTP

IKEv2 and SSTP are not mutually exclusive. When using Windows Routing and Remote Access Service (RRAS) as the VPN server, both protocols can be configured and enabled for VPN clients. To allow VPN clients to automatically select a protocol, the NativeProtocolType element in ProfileXML can be set to Automatic.

Always On VPN IKEv2 and SSTP Fallback

IKEv2 with SSTP Fallback?

In theory, with the NativeProtocolType set to Automatic, the Windows 10 client would first attempt to establish an IKEv2 connection, then fall back to SSTP if IKEv2 is not available. In practice, this is not the case.

SSTP Preferred over IKEv2

In operation, setting the NativeProtocolType to Automatic results in the Windows 10 client attempting to establish a VPN connection using SSTP first! If the SSTP connection fails, only then will IKEv2 be used. The only scenario in which I can imagine SSTP failing and IKEv2 being successful would be if SSTP is not supported by the VPN server. Sadly, this scenario may result in failed connections due to a bug in the way ProfileXML settings are processed. Details here.

VPN Strategy

The initial VPN protocol selection behavior is dictated by the VpnStrategy setting of the Always On VPN connection in the rasphone.pbk file. This file can be found under C:\Users\[username]\AppData\Roaming\Microsoft\Network\Connections\Pbk. The documentation on the Microsoft website is terribly outdated and does not include the following important VpnStrategy settings pertinent to Windows 10 Always On VPN connections.

  • 5 = Only SSTP is attempted
  • 6 = SSTP is attempted first
  • 7 = Only IKEv2 is attempted
  • 8 = IKEv2 is attempted first
  • 14 = IKEv2 is attempted followed by SSTP

Always On VPN Default Behavior

For Always On VPN, when the NativeProtocolType is set to Automatic in ProfileXML, VpnStrategy is set to 6 by default, which means the connection will attempt to use SSTP first. If it fails, IKEv2 will be attempted.

Always On VPN IKEv2 and SSTP Fallback

If the NativeProtocolType in ProfileXML is set to IKEv2, VpnStrategy is set to 7 and only IKEv2 is used. A connection using SSTP is never attempted.

Workaround

Setting the VpnStrategy to 8 or 14 will force the client to attempt an IKEv2 connection first. However, this setting is dynamically updated by Windows and is subject to change. For example, if an IKEv2 connection fails and SSTP is successful, Windows will then set the VpnStrategy to 6 and all subsequent VPN connection attempts will use SSTP first. Because of this it will be necessary to update the VpnStrategy setting each time prior to establishing a VPN connection. This will require some clever scripting and perhaps automation using a scheduled task based on an event trigger. I will leave that custom configuration as an exercise for the reader. If you’ve developed something to address this challenge, please feel free to share in the comments below. 🙂

Additional Information

Always On VPN Protocol Recommendations for Windows Server RRAS

Always On VPN IKEv2 Security Configuration

Always On VPN Certificate Requirements for IKEv2

Always On VPN IKEv2 Load Balancing with KEMP LoadMaster Load Balancer

Always On VPN IKEv2 Connection Failure Error Code 800

Always On VPN administrators may encounter a scenario in which Windows 10 clients are unable to establish an IKEv2 VPN connection to a Windows Server Routing and Remote Access Service (RRAS) server or a third-party VPN device under the following conditions.

  1. The VPN connection is configured using ProfileXML.
  2. ProfileXML includes the <CryptographySuite> element.
  3. The VPN server is configured to use a custom IPsec policy.
  4. The VPN server supports only IKEv2.
  5. The <NativeProtocolType> in ProfileXML is set to Automatic.

When these specific conditions are met, the client will be unable to connect to the VPN server using IKEv2. The error message states:

The remote connection was not made because the attempted VPN tunnels failed. The VPN server might be unreachable. If this connection is attempting to use an L2TP/IPsec tunnel, the security parameters required for IPsec negotiation might not be configured properly.

Always On VPN IKEv2 VPN Connection Failure Error Code 800

In addition, the event log will include an error message from the RasClient source with event ID 20227 that includes the following error message.

The user [username] dialed a connection named [connection name] which has failed. The error code returned on failure is 800.

Always On VPN IKEv2 VPN Connection Failure Error Code 800

A manually configured VPN connection using IKEv2 will connect successfully under these same conditions, however.

IKEv2 Error Code 800

Error code 800 translates to ERROR_AUTOMATIC_VPN_FAILED, which is somewhat ambiguous. The error description is:

Unable to establish the VPN connection. The VPN server may be unreachable, or security parameters may not be configured properly for this connection.

Digging Deeper

A network trace of the IKEv2 VPN connection reveals the true source of the problem, which is a failure of the client and server to successfully negotiate an IKEv2 security association (SA). During the SA initiation process, the parameters offered by the client are unacceptable to the server, resulting in a NO_PROPOSAL_CHOSEN notification being returned by the server.

Always On VPN IKEv2 VPN Connection Failure Error Code 800

Custom Cryptography Settings Ignored

It appears that the Always On VPN connection ignores the custom cryptography settings defined in the CryptographySuite element in ProfileXML. However, this only occurs when the NativeProtocolType is set to Automatic. Presumably, this is a bug. 🙂

Workaround

As a workaround, set the NativeProtocolType to IKEv2. When NativeProtocolType is set to IKEv2, the VPN connection recognizes the IKEv2 parameters defined in the CryptographySuite element and the VPN connection will be established successfully.

Additional Information

Always On VPN IKEv2 Security Configuration

Always On VPN Certificate Requirements for IKEv2

Always On VPN IKEv2 Load Balancing with the KEMP LoadMaster Load Balancer

Always On VPN Routing Configuration

Windows 10 Always On VPN Routing ConfigurationWhen configuring Windows 10 Always On VPN, the administrator must choose between force tunneling and split tunneling. When force tunneling is used, all network traffic from the VPN client is routed over the VPN tunnel. When split tunneling is used, the VPN client must be configured with the necessary IP routes to establish remote network connectivity to on-premises resources. How those routes are established is a common source of confusion. This article provides guidance for properly configuring routing for Always On VPN clients.

Class Based Routing

IP addresses are assigned to Windows 10 Always On VPN clients from either a static pool of addresses configured by the administrator or by DHCP. If split tunneling is enabled, the client will also be assigned a class-based route that is derived from the IP address assigned to it by the VPN server, by default. If the client is assigned an IP address from the Class A network, a corresponding /8 prefix is used. For Class B networks a /16 prefix is defined, and for Class C networks a /24 prefix is used.

As an example, if the VPN server assigns the client an IP address of 10.21.12.103, a route to the 10.0.0.0/8 network is added to the client’s routing table, as shown here.

Windows 10 Always On VPN Routing Configuration

Complex Networks

This default class-based route is of limited use though, and is only applicable when the internal network is simple and VPN clients are assigned IP addresses from the same subnet class. In the example above, if the entire internal network resides in the 10.0.0.0/8 Class A address space, all resources will be reachable by the VPN client. Any resources in the Class B or Class C subnet ranges would be unreachable without additional configuration.

Route Configuration

To configure routing for Windows 10 Always On VPN clients, first disable the default class-based route by defining the following element in ProfileXML as shown here.

<VPNProfile>
   <NativeProfile>
      <DisableClassBasedDefaultRoute>true</DisableClassBasedDefaultRoute>
   </NativeProfile>
</VPNProfile>

Next, enable specific routes as needed by defining the following element(s) in ProfileXML. The example below defines routes for all private RFC 1918 networks.

<VPNProfile>
   <Route>
      <Address>10.0.0.0</Address>
      <PrefixSize>8</PrefixSize>
   </Route>
   <Route>
      <Address>172.16.0.0</Address>
      <PrefixSize>12</PrefixSize>
   </Route>
   <Route>
      <Address>192.168.0.0</Address>
      <PrefixSize>16</PrefixSize>
   </Route>
</VPNProfile>

Once implemented, the VPN client’s routing table will appear as shown here.

Windows 10 Always On VPN Routing Configuration

Summary

Proper routing is crucial for ensuring full network connectivity and access to internal resources for Windows 10 Always On VPN clients. When split tunneling is employed, avoid using the default class-based route and instead define specific routes using ProfileXML as required.

Additional Information

Always On VPN Client DNS Server Configuration

Deploying Windows 10 Always On VPN with Microsoft Intune

Windows 10 Always On VPN Certificate Requirements for IKEv2

Windows 10 Always On VPN Certificate Requirements for SSTP

Always On VPN Client DNS Server Configuration

Always On VPN Client DNS Server ConfigurationDNS server configuration for Windows 10 Always On VPN clients is crucial to ensuring full access to internal resources. For Always On VPN, there are a few different ways to assign a DNS server to VPN clients.

Default DNS Servers

By default, Windows 10 clients use the same DNS server the VPN server is configured to use. This is true even if the VPN client IP address assignment method is DHCP.

Always On VPN Client DNS Server Configuration

There may be some scenarios in which this is not appropriate. For example, if the DNS server is in a DMZ network and is not configured to use internal Active Directory domain DNS servers, clients will be unable to access internal resources.

DNS Server Assignment

To configure Windows 10 Always On VPN clients to use DNS servers other than those configured on the VPN server, configure the DomainNameInformation element in the ProfileXML, as shown here.

<VPNProfile>
   <DomainNameInformation>
      <DomainName>.corp.example.net</DomainName>
      <DnsServers>10.21.12.100,10.21.12.101</DnsServers>
   </DomainNameInformation>
</VPNProfile>

Note: Be sure to include the lading “.” In the domain name to ensure that all hosts and subdomains are included.

Always On VPN Client DNS Server Configuration

Reference: https://docs.microsoft.com/en-us/windows/client-management/mdm/vpnv2-csp

DNS and NRPT

Once the DomainNameInformation element has been defined, the new DNS server assignment does NOT appear on the VPN virtual adapters interface. In fact, it will still be configured to use the DNS server assigned to the VPN server, just as before. Using the DomainNameInformation element instead configures the Name Resolution Policy Table (NRPT) and assigns the new DNS server to the namespace defined by the administrator. You can view the NRPT running the Get-DnsClientNrptPolicy PowerShell command.

Always On VPN Client DNS Server Configuration

Additional Information

Windows 10 Always On VPN and the Name Resolution Policy Table (NRPT)

Deploying Windows 10 Always On VPN with Microsoft Intune

Windows 10 Always On VPN Certificate Requirements for IKEv2

Windows 10 Always On VPN Hands-On Training

Deploying Windows 10 Always On VPN with Microsoft Intune

Deploying Windows 10 Always On VPN with Microsoft IntuneWindows 10 Always On VPN is the replacement for Microsoft’s popular DirectAccess remote access solution. It provides the same seamless, transparent, always on remote connectivity as DirectAccess. Where DirectAccess relied heavily on classic on-premises infrastructure such as Active Directory and Group Policy, Always On VPN is infrastructure independent and is designed to be provisioned and managed using a Mobile Device Management (MDM) platform such as Microsoft Intune.

Intune and Always On VPN

Until recently, provisioning Windows 10 Always On VPN connections involved manually creating a ProfileXML and uploading to Intune using a custom profile. This has proven to be challenging for many, as the process is unintuitive and error prone.

A recent Intune update now allows administrators to create a basic Windows 10 Always On VPN deployment. Although it still has its limitations, it will go a long way to making the adoption of Always On VPN easier.

Prerequisites

Certificates must first be provisioned to all clients before deploying Windows 10 Always On VPN using Intune. In addition, if using a third-party VPN client, the VPN plug-in software must be installed prior to deploying the VPN profile.

Test VPN Connection

It is recommended that a test VPN connection be created on a client machine locally before deploying an Always On VPN profile using Intune. This allows the administrator to test connectivity and validate Extensible Authentication Protocol (EAP) settings. Once complete, run the following PowerShell commands to extract the EAP configuration settings to a file for later publishing with Intune.

$Vpn = Get-VpnConnection -Name [Test VPN connection name]
$Xml = $Vpn.EapConfigXmlStream.InnerXml | Out-File .\eapconfig.xml -Encoding ASCII

Deploying Always On VPN with Intune

Follow the steps below to deploy an Always On VPN connection using Intune.

Create a VPN Profile

  1. Open the Microsoft Intune management portal.
  2. Click Device configuration.
  3. Click Profiles.
  4. Click Create profile.

Deploying Windows 10 Always On VPN with Microsoft Intune

  1. Enter a name for the VPN profile.
  2. Enter a description (optional).
  3. From the Platform drop-down menu select Windows 10 and later.
  4. From the Profile type drop-down menu select VPN.
  5. In the Settings section click Configure.

Deploying Windows 10 Always On VPN with Microsoft Intune

Define VPN Profile Settings

  1. Click Base VPN.
  2. Enter a name for the connection.
  3. Enter a description and provide the Fully Qualified Domain Name (FQDN) of the VPN server. If it will be the default server select True and click Add.
  4. Enter a description and provide the FQDN for any additional VPN servers, as required.
  5. From the Connection type drop-down list choose the preferred connection type.
  6. In the Always On section click Enable.
  7. Select Enable to Remember credentials at each logon (optional).
  8. Click Select a certificate.
  9. Choose a client authentication certificate and click Ok.
  10. Paste the contents of eapconfig.xml (saved previously) in the EAP Xml field.
  11. Click Ok.

Deploying Windows 10 Always On VPN with Microsoft Intune

Define Additional Settings

You can also configure the following optional VPN settings using Intune.

  • Apps and Traffic Rules
  • Conditional Access
  • DNS Settings
  • Proxy
  • Split Tunneling

Deploying Windows 10 Always On VPN with Microsoft Intune

After configuring any required additional settings, click Create.

Assign VPN Profile

  1. Click Assignments.
  2. From the Assign to drop-down menu choose Selected Groups.
  3. Click Select groups to include.
  4. Choose an Azure Active Directory group to apply the VPN profile and click Select.
  5. Click Save.

Deploying Windows 10 Always On VPN with Microsoft Intune

Limitations

Although the ability to provision Always On VPN using Microsoft Intune without using a custom profile is welcome, it is not without its limitations. At the time of this writing, only Always On VPN user profiles can be configured. A device tunnel, which is optional, must be configured manually using a custom profile. In addition, the Intune user interface lacks the ability to define settings for the following parameters:

  • Exclusion routes
  • Name Resolution Policy Table (NRPT) exemptions
  • Lockdown mode
  • DNS registration
  • Trusted network detection
  • Custom IKEv2 cryptography policy

To make changes to the default settings for any of the above parameters, a ProfileXML must be created manually and provisioned with Intune using a custom policy.

Additional Information

Windows 10 Always On VPN Device Tunnel Step-by-Step Configuration using PowerShell

Windows 10 Always On VPN Certificate Requirements for IKEv2

Windows 10 Always On VPN and the Name Resolution Policy Table (NRPT)

Windows 10 Always On VPN Hands-On Training

Always On VPN and the Name Resolution Policy Table (NRPT)

Always On VPN and the Name Resolution Policy Table (NRPT)The Name Resolution Policy Table (NRPT) is a function of the Windows client and server operating systems that allows administrators to enable policy-based name resolution request routing. Instead of sending all name resolution requests to the DNS server configured on the computer’s network adapter, the NRPT can be used to define unique DNS servers for specific namespaces.

DirectAccess administrators will be intimately familiar with the NRPT, as it is explicitly required for DirectAccess operation. Use of the NRPT for Windows 10 Always On VPN is optional, however. It is commonly used for deployments where split DNS is enabled. Here the NRPT can define DNS servers for the internal namespace, and exclusions can be configured for FQDNs that should not be routed over the VPN tunnel.

To enable the NRPT for Windows 10 Always On VPN, edit the ProfileXML to include the DomainNameInformation element.

<DomainNameInformation>
   <DomainName>.example.net</DomainName>
   <DnsServers>10.21.12.100,10.21.12.101</DnsServers>
</DomainNameInformation>

Note: Be sure to include the leading “.” in the domain name to ensure that all hosts and subdomains are included.

To create an NRPT exclusion simply omit the DnsServers element. Define additional entries for each hostname to be excluded, as shown here.

<DomainNameInformation>
   <DomainName>www.example.net</DomainName>
</DomainNameInformation>
<DomainNameInformation>
   <DomainName>mail.example.net</DomainName>
</DomainNameInformation>
<DomainNameInformation>
   <DomainName>autodiscover.example.net</DomainName>
</DomainNameInformation>

Additional Information

Windows 10 VPNv2 Configuration Service Provider (CSP) Reference

Windows 10 Always On VPN Protocol Recommendations for Windows Server Routing and Remote Access Services (RRAS)

Windows 10 Always On VPN Hands-On Training

Always On VPN Windows 10 Device Tunnel Step-by-Step Configuration using PowerShell

Always On VPN Windows 10 Device Tunnel Step-by-Step Configuration using PowerShellWindows 10 Always On VPN and DirectAccess both provide seamless, transparent, always on remote network access for Windows clients. However, Always On VPN is provisioned to the user, not the machine as it is with DirectAccess. This presents a challenge for deployment scenarios that require the VPN connection to be established before the user logs on. To address this issue, Microsoft introduced support for a device tunnel configuration option beginning with Windows 10 version 1709 (Fall creators update).

Want to learn more about Windows 10 Always On VPN? Register for one of my hands-on training classes now forming in cities across the U.S. Details here.

Prerequisites

To support an Always On VPN device tunnel, the client computer must be running Windows 10 Enterprise or Education version 1709 (Fall creators update). It must also be domain-joined and have a computer certificate with the Client Authentication Enhanced Key Usage (EKU) issued by the organization’s Public Key Infrastructure (PKI).

Always On VPN Windows 10 Device Tunnel Step-by-Step Configuration using PowerShell

In addition, only the built-in Windows VPN client is supported for Always On VPN device tunnel. Although Windows 10 Always On VPN user connections can be configured using various third-party VPN clients, they are not supported for use with the device tunnel.

VPN ProfileXML

The Always On VPN device tunnel is provisioned using an XML file. You can download a sample VPN ProfileXML file here. Make any changes required for your environment such as VPN server hostnames, routes, traffic filters, and remote address ranges. Optionally include the trusted network detection code, if required. Do not change the protocol type or authentication methods, as these are required.

Always On VPN Windows 10 Device Tunnel Step-by-Step Configuration using PowerShell

Reference: https://docs.microsoft.com/en-us/windows-server/remote/remote-access/vpn/vpn-device-tunnel-config#configure-the-vpn-device-tunnel

Once the ProfileXML file is created, it can be deployed using Intune, System Center Configuration Manager (SCCM), or PowerShell. In this post I’ll cover how to configure Windows 10 Always On VPN device tunnel using PowerShell.

Client Configuration

Download the PowerShell script located here and then copy it to the target client computer. The Always On VPN device tunnel must be configured in the context of the local system account. To accomplish this, it will be necessary to use PsExec, one of the PsTools included in the Sysinternals suite of utilities. Download PsExec here, copy it to the target machine, and then run the following command in an elevated PowerShell command window.

PsExec.exe -i -s C:\windows\system32\WindowsPowerShell\v1.0\powershell.exe

Always On VPN Windows 10 Device Tunnel Step-by-Step Configuration using PowerShell

Another elevated PowerShell window will open, this one now running in the context of the local system account. In this window, navigate to the folder where you copied the PowerShell script and XML file to. Run the PowerShell script and specify the name of the ProfileXML file, as shown below.

VPN_Profile_Device.ps1 -xmlFilePath .\profileXML_device.XML -ProfileName DeviceTunnel

Always On VPN Windows 10 Device Tunnel Step-by-Step Configuration using PowerShell

To verify creation of the VPN device tunnel, run the following PowerShell command.

Get-VpnConnection -AllUserConnection

Always On VPN Windows 10 Device Tunnel Step-by-Step Configuration using PowerShell

Note: Be advised that the ConnectionStatus is always Disconnected. Hopefully this will be addressed by Microsoft in the near future.

Server Configuration

If you are using Windows Server 2012 R2 or Windows Server 2016 Routing and Remote Access Service (RRAS) as your VPN server, you must enable machine certificate authentication for VPN connections and define a root certification authority for which incoming VPN connections will be authenticated with. To do this, open an elevated PowerShell command and run the following commands.

$VPNRootCertAuthority = “Common Name of trusted root certification authority”
$RootCACert = (Get-ChildItem -Path cert:LocalMachine\root | Where-Object {$_.Subject -Like “*$VPNRootCertAuthority*” })
Set-VpnAuthProtocol -UserAuthProtocolAccepted Certificate, EAP -RootCertificateNameToAccept $RootCACert -PassThru

Always On VPN Windows 10 Device Tunnel Step-by-Step Configuration using PowerShell

Summary

Once the Always On VPN device tunnel is configured, the client computer will automatically establish the connection as soon as an active Internet connection is detected. This will enable remote logins for users without cached credentials, and allow administrators to remotely manage Always On VPN clients without requiring a user to be logged on at the time.

Additional Information

Configure Windows 10 VPN Device Tunnel on Microsoft.com

3 Important Advantages of Always On VPN over DirectAccess

5 Things DirectAccess Administrators Should Know About Always On VPN 

Windows 10 Always On VPN and the Future of DirectAccess

Windows 10 Always On VPN Training and Consulting Services

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