Set-IKEv2SecurityBaseline PowerShell script on Githubįirst of all – thanks for all you very informative articles on the DirectAcess and AlwaysOn VPN Show-VpnConnectionIPsecConfiguration PowerShell script on Github Windows 10 Always On VPN IKEv2 Features and Limitations Windows 10 Always On VPN IKEv2 Security Configuration Use the PowerShell commands in the above referenced above to validate settings and make changes when necessary. IKEv2 policy mismatch errors can be resolved easily by ensuring both the VPN server and client are configured to use the same IPsec security policies. Basic and No encryption can be safely disabled. The NPS policy for Always On VPN must include Strong encryption at a minimum. Specifically, administrators may disable Basic and Strong encryption for MPPE in an attempt to improve security. NPS PolicyĪnother common cause of IKEv2 policy mismatch errors is a misconfigured Network Policy Server (NPS) network policy. Guidance for configuring IKEv2 security policies on Windows Server RRAS and Windows 10 can be found here.
Note: If this PowerShell command returns no output, the VPN connection is not using a custom IKEv2 IPsec security policy. Get-VpnConnection -Name | Select-Object -ExpandProperty IPsecCustomPolicy To view a VPN client’s currently configured IKEv2 security policy, open an elevated PowerShell command window and run the following command. To ensure interoperability, the VPN client must be configured to use the same IKEv2 security policy as defined on the sever. To view the current IKEv2 IPsec policy configuration, open an elevated PowerShell command window and run the following command. Essentially this error indicates that the IKEv2 security policy on the client did not match the configuration on the server. The error code returned on failure is 13868.”Įrror code 13868 translates to ERROR_IPSEC_IKE_POLICY_MATCH. “The user dialed a connection named which has failed.
When the connection attempt fails, an error will be recorded in the Windows Application event log from the RasClient source with Event ID 20227. When configuring Windows Server Routing and Remote Access Service (RRAS) or a third-party VPN appliance to support IKEv2 using custom security policies, the administrator may encounter a scenario in which a connection cannot be established due to a policy mismatch error. Before using IKEv2 VPN in a production environment the administrator will need to update these security settings accordingly. However, as I’ve written about in the past, often the default IKEv2 security settings are less than desirable.
The Internet Key Exchange version 2 (IKEv2) VPN protocol is the protocol of choice for Windows 10 Always On VPN deployments where the highest levels of security and assurance are required.
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