Fix Always-On VPN Device Tunnel Not Reconnecting on Windows 11

Why the Windows 11 Device Tunnel Does Not Reconnect Automatically

The Always-On VPN Device Tunnel in Windows 11 relies on a combination of profile configuration, network trigger settings, and authentication trust. When any of these components fails, the tunnel does not re-establish after a temporary network outage.

The most common root causes are:

Missing Always-On and Device Tunnel Flags in the Profile XML

The VPN profile XML must contain two specific elements: <AlwaysOn>true</AlwaysOn> and <DeviceTunnel>true</DeviceTunnel>. If either is missing or set to false, Windows treats the profile as a user tunnel or as a manual connection that does not auto-reconnect. Many administrators deploy profiles without these flags because they rely on older templates or forget to include them.

Incorrect DNS Trigger Configuration

Windows 11 uses DNS name resolution as a trigger to re-establish the VPN tunnel. When a network interface loses connectivity, the system attempts to resolve a configured DNS suffix. If the resolution fails, it starts the VPN connection. Without the correct DNS suffix in the trigger list, the system never attempts to reconnect.

Certificate or Credential Expiration

Device Tunnel authentication uses machine certificates or pre-shared keys. If the certificate has expired, is revoked, or is not trusted by the VPN server, the tunnel cannot authenticate after a disconnect. User credentials stored in the Windows Credential Manager may also expire or become corrupted.

Windows Filtering Platform Blocking the Tunnel

Third-party firewall or security software that hooks into the Windows Filtering Platform can block the VPN adapter or the IKEv2 protocol. This prevents the tunnel from reconnecting even when the profile and triggers are correct.

Steps to Restore Automatic Reconnection of the Device Tunnel

Follow these steps in order. After each step, test the reconnection by disconnecting the network interface and waiting 30 seconds.

Step 1: Verify the VPN Profile XML Contains the Required Flags

1. Open PowerShell as Administrator
   Press Windows + X and select Terminal (Admin).
2. Export the VPN profile to an XML file
   Run the command: Get-VpnConnection -Name "YourVPNProfileName" | Select-Object -ExpandProperty ServerList | ForEach-Object { $_.ServerAddress } | Out-File -FilePath C:\VPNProfile.xml. Replace YourVPNProfileName with the exact name of your VPN connection.
3. Open the XML file in Notepad
   Run notepad C:\VPNProfile.xml. Look for the <AlwaysOn> and <DeviceTunnel> elements. If they are missing or set to false, edit the file to include them:

<VPNProfile>
  <AlwaysOn>true</AlwaysOn>
  <DeviceTunnel>true</DeviceTunnel>
  <!-- other settings -->
</VPNProfile>

4. Reapply the corrected profile
   Run: Set-VpnConnection -Name "YourVPNProfileName" -AllUserConnection -Force -PassThru. Then import the updated XML with Import-VpnConnection -Name "YourVPNProfileName" -AllUserConnection -FilePath C:\VPNProfile.xml.

Step 2: Configure DNS Trigger Suffixes

1. Open PowerShell as Administrator
   Press Windows + X and select Terminal (Admin).
2. Add a DNS suffix that triggers VPN reconnection
   Run: Add-VpnConnectionTriggerDnsConfiguration -ConnectionName "YourVPNProfileName" -DnsSuffix "corp.example.com". Replace corp.example.com with a DNS suffix that is only resolvable through the VPN. Use multiple suffixes if needed by repeating the command.
3. Verify the trigger list
   Run: Get-VpnConnectionTrigger -ConnectionName "YourVPNProfileName". Confirm the DnsSuffix property lists the suffixes you added.

Step 3: Check and Refresh Machine Certificate Trust

1. Open the Certificates snap-in for the local machine
   Press Windows + R, type certlm.msc, and press Enter.
2. Locate the VPN client certificate
   Navigate to Personal > Certificates. Find the certificate issued by your VPN server or CA. Double-click it and check the Valid from and Valid to dates. If expired, request a new certificate from your CA.
3. Verify the trusted root CA
   Navigate to Trusted Root Certification Authorities > Certificates. Ensure the CA that issued the VPN server certificate is present. If missing, import the CA certificate from your network administrator.

Step 4: Clear and Re-Store Credentials in Credential Manager

1. Open Credential Manager
   Press Windows + R, type control /name Microsoft.CredentialManager, and press Enter.
2. Delete old VPN credentials
   Click Windows Credentials. Look for entries that contain your VPN server name or VPN profile name. Click the arrow and select Remove.
3. Reconnect the VPN manually
   Open Settings > Network & internet > VPN. Click your VPN profile and select Connect. Enter credentials if prompted and check Remember my credentials.

Step 5: Disable Third-Party Firewall Temporarily for Testing

1. Identify the third-party security software
   Press Ctrl + Shift + Esc to open Task Manager. Go to the Startup tab and look for firewall or antivirus entries.
2. Disable the software temporarily
   Right-click the icon in the system tray and select Disable or Exit. Alternatively, go to Settings > Apps > Installed apps, find the software, and click Advanced options > Terminate.
3. Test the VPN reconnection
   Disconnect the network cable or disable Wi-Fi. Wait 30 seconds and re-enable the network. If the tunnel reconnects, the security software was blocking the VPN. Add an exception for the IKEv2 protocol and the VPN adapter in the firewall rules.

If the Device Tunnel Still Does Not Reconnect

No VPN Adapter Appears After Network Restoration

If the VPN adapter does not appear in Network Connections after reconnecting the network, the Windows Filtering Platform driver may be corrupted. Open PowerShell as Administrator and run netsh int ip reset followed by netsh winsock reset. Restart the computer and test again.

Event ID 20227 or 20230 in the System Log

These events indicate IKEv2 authentication failures. Open Event Viewer > Windows Logs > System. Look for source RasClient or RemoteAccess. The error message usually states the reason, such as certificate not trusted or certificate expired. Follow Step 3 to refresh the certificate trust chain.

VPN Profile Is Not Applied to All Users

Device Tunnel profiles must be deployed as all-user connections. Open PowerShell as Administrator and run Get-VpnConnection -AllUserConnection. If your profile does not appear in the output, it is a per-user connection. Use Add-VpnConnection -AllUserConnection with the correct parameters to create a new all-user profile.

Always-On VPN Device Tunnel vs User Tunnel: Reconnection Behavior

The Device Tunnel is designed for machine-level connectivity before user logon. The User Tunnel handles per-user traffic after authentication. For reliable reconnection, the Device Tunnel requires the correct XML flags, a valid machine certificate, and at least one DNS trigger suffix. The User Tunnel depends on user credential validity and application-level triggers.

You can now verify and repair the Always-On VPN Device Tunnel reconnection on Windows 11. Start by checking the profile XML for the <AlwaysOn> and <DeviceTunnel> flags, then configure DNS triggers with the Add-VpnConnectionTriggerDnsConfiguration cmdlet. For persistent failures, examine Event ID 20227 in the System log to identify certificate or authentication issues. As an advanced tip, use Get-VpnConnection -AllUserConnection | Format-List to dump every property of the VPN profile and spot misconfigurations that the GUI hides.