You will find many complaining about this issue and discussing various attempts at resolution on the Microsoft forums. Seems to me we got no choice to schedule a reboot, we plan also on setting SCOM alerting on it when we reach a certain threshold.Likely the single most common complaint about Windows 10 Always On VPN is that device tunnel or user tunnel VPN connections fail to reconnect automatically after a laptop computer wakes from sleep or hibernate. The problem is that this particular business unit has to be 24/7. The only workaround we have so far is a server reboot. Let’s say we have approx 240 users on that site, we have 490 ports configured, services crashes and we run out of ports available. Lately we had a random issue with one of our RAS where the IKEEXT service simply crashes and creates double “ports” consumption. We are approx 1000 employees splitted in 3 sites and 2 domains. Thanks for all your posts it really helped us setting multiple RAS servers for our enterprise. Additional InformationĪlways On VPN Network Policy Server (NPS) Load BalancingĪlways On VPN and Windows Server 2019 NPS Bug This is accomplished by selecting the option “Don’t ask user to authorize new servers or trusted CAs” in the Notifications before connecting drop-down list, and by selecting the option “Don’t prompt user to authorize new servers or trusted certification authorities“. Authorized NPS servers should be defined by administrators exclusively. For this reason, it is recommended that users not be given the choice to authorize an NPS server. Validating the NPS server before authenticating is crucial to ensuring the highest level of security and assurance, preventing credential theft from a man-in-the-middle attack. To be clear, the behavior above is not ideal from a security perspective. Failure to do so will result in connection prompts. Note: Administrators must ensure that all VPN clients have updated their EAP configuration before adding additional NPS servers to the environment. Also, ensure that all NPS servers used for authentication (those defined on the VPN server) are included in this list. Missing either one of these critical details will result in connection prompts. Multiple servers are separated by a semi-colon and there are no additional spaces. Look carefully at the syntax when defining multiple NPS servers. Ensure the hostname listed in the “Connect to these servers” field matches the subject name or SAN of the NPS server certificate defined in the network policy used for the Always On VPN user tunnel. Although the NPS server may have the correct hostname configured on its certificate, it may not be entered correctly on the client. EAP ConfigurationĪlternatively, the client-side EAP configuration may be incorrect. The certificate must be issued by the organizations private certification authority (CA). The NPS server performing authentication for the connection request must have a certificate that includes a subject name that matches one of the names of the NPS servers defined in the EAP configuration. This message can occur when (EAP) is used and is configured to perform server validation with a restricted set of NPS servers, as shown here. You can still connect if you trust this server.” Common Causes Continue connecting? We don’t have enough info to validate the server. When establishing an Always On VPN user tunnel connection, users may find the connection does not complete automatically, and they are informed that additional action is needed.Ĭlicking on the VPN connection and then clicking Connect prompts the user with the following message. This post covers one of the more common issues related to EAP/PEAP misconfiguration. EAP, and especially Protected EAP (PEAP), has a lot of settings to configure and it is not uncommon to encounter issues related to some parameters being defined incorrectly. Using the Extensible Authentication Protocol (EAP) with client certificates is the recommended best practice for authentication for Windows 10 Always On VPN deployments.
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