Ikev2 network outage time

This presents a challenge for deployment scenarios that require the VPN connection to be established before the user logs on. For example, pre-logon connectivity is required to support remote logon without cached credentials.

To address this issue and to provide feature parity with DirectAccess, Microsoft introduced support for a device tunnel configuration option beginning with Windows 10 version Fall creators update.

More details here! Make any changes required for your environment such as VPN server hostnames, routes, traffic filters, and remote address ranges.

Configuring The Authentication Method Used

Optionally include the trusted network detection code, if required. Do not change the protocol type or authentication methods, as these are required.

Download the PowerShell script located here and then copy it to the target client computer. To accomplish this, it will be necessary to use PsExecone of the PsTools included in the Sysinternals suite of utilities. Download PsExec herecopy it to the target machine, and then run the following command in an elevated PowerShell command window.

Another elevated PowerShell window will open, this one now running in the context of the local system account. This has been fixed in Windows 10 To do this, open an elevated PowerShell command and run the following commands.

Using PowerShell to provision an Always On VPN device tunnel is helpful for initial testing and small pilot deployments, but it does not scale very well. You can also view the following demonstration video that includes detailed guidance for provisioning the Always On VPN device tunnel using Microsoft Intune. 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.

We are experiencing issues where, once the device tunnel is created, the user profile does not connect when logged on. It tries to connect for about 5 times and then stops. Seems that the devicetunnel is preventing the user tunnel.The remaining clients stay connected through out the day.

The disconnected clients have Error Codehowever it I've had users who are connected to their home internet switch from WiFi to ethernet and vice versa, as well as work off our test network in the office. Those same users are still getting disconnected while others can stay connected to that same access point and remain connected throughout the day.

I thought the issue may actually be the connection being disconnected for them being timed out but I'm not sure. This error appears when the modem in the case of dial-up or broadband connections or tunnel in the case of VPN connections is disconnected due to a network failure or a failure in the physical link to the modem.

However, Some people think the error may be related to the update. I would suggest you update to the latest. Please remember to mark the replies as an answers if they help.

If you have feedback for TechNet Subscriber Support, contact tnmff microsoft. I'll work on getting all the details from the event viewer for the device in which that server log is related to. Can you advise if the update you're talking about is related to a Windows Server update or a Windows 10 update? I can confirm the machines are on the latest version of Windows 10 and the Mobility settings are configured and set at the default 30 minutes.

Any other suggestions? My suggestion is to contact Microsoft Support to get them involved in checking your configuration. Office Office Exchange Server. Not an IT pro? Resources for IT Professionals.

Sign in. United States English. Ask a question. Quick access. Search related threads. Remove From My Forums. Asked by:. Archived Forums. Network Infrastructure Servers. Sign in to vote. Monday, May 6, PM. Hi, This error appears when the modem in the case of dial-up or broadband connections or tunnel in the case of VPN connections is disconnected due to a network failure or a failure in the physical link to the modem.

Any more error message in event viewer on clients? Best regards, Travis Please remember to mark the replies as an answers if they help. Tuesday, May 7, AM.With the current climate and radical change to working methods COVID has brought worldwide, more of us are either working from home due to requirements or now enjoying the flexibility this new style of working has brought to the modern workplace. But sometimes, the connection for the client — which was working perfectly fine — suddenly gives an error cannot contact VPN Server.

No changes have occurred on the client, no changes on the server, no changes on the firewall, Richard Hicks articles consulted and confirmed all is as it should be. Not ideal, but a workaround at least. The Keepalives should timeout after a period, but it appears from observation in the wild that it does not, and this has been observed in multiple environments. This by itself does not cause issues for the VPN service itself, as when the client comes back online it either reconnects the session or creates a new one.

ikev2 network outage time

However, this can cause unexpected results when dealing with other devices on the network, like a perimeter firewall. Because of these unwanted keepalives, the firewall device in this case never closed the connection because of Keepalive traffic across the wire and when the client tries to reconnect it refuses the connection and you get your error. The only workaround to this particular case was to clear the firewall session and the client was able to connect again without any configuration or remediation on the server or client.

Looking further into this issue for a customer to avoid having to employ the workaround, there is little or no documentation regarding the ability to restrict the IKEv2 Keepalives frequency aside from the Mobility functionality by reducing the Idle or Network Outage times.

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

Working on a test system we were able to replicate these unwanted disconnects by initiating Airplane mode on the test device and we saw Keepalives being generated past the Network Outage thresholds. Reducing these from the default 30 minutes to a more aggressive threshold of 5 might not be right for every environment but from initial testing normal VPN tunnel connectivity was not affected. However, the Keepalive issue had not been resolved and so the firewall issue persisted.

PowerON takes no responsibility for issues or outages that may occur following implementation of the below. After implementing the changes and rebooting the server, the Airplane mode test was repeated and the number of keepalives, after the VPN connection in the RRAS console had been dropped badly, a further ten Keepalives packets were observed from the server as desired.

Results of this change will be provided to Microsoft who are alleged to be looking into potential future patches for this and other issues for the AOVPN service. This free resource is not designed to be an enterprise grade solution, but if you do want to evaluate this technology, it will guide you through the first steps.

If you have any questions around the documentation or AOVPN solutions in general, feel free to email info poweronplatforms. October 8, A Potential Solution Looking further into this issue for a customer to avoid having to employ the workaround, there is little or no documentation regarding the ability to restrict the IKEv2 Keepalives frequency aside from the Mobility functionality by reducing the Idle or Network Outage times.

Damian Shiell Connect on LinkedIn. Share on facebook Share on Facebook. Share on twitter Share on Twitter. Share on linkedin Share on LinkedIn. Related resources. Creating an Agile Business with a Mobile-First Mindset Enabling a mobile-first mindset for business agility and competitive advantage. Reducing Risk with Secure Server Patch Management Reduce risk and keep your business one step ahead with secure server patching.

Partner with us Find out how we can transform your organisation. Discover how we can transform your organisation. Sign up to receive the latest industry news, views and events. Click here. This website uses Cookies. View Cookie Policy here.It is configured to use IKEv2 with Windows credentials used so users don't have to log in after logging into their laptops. Whilst the client setup has mobility enabled for 5 minutes.

The problem comes when a client gets disconnected for whatever reason, some users will see the following message:. This will clear itself after a while but is hugely inconvenient for users. I had a case raised with Microsoft and they told me to reduce mobility settings which made a big difference but this is still common for some users. Please remember to mark the replies as answers if they help. If you have feedback for TechNet Subscriber Support, contact tnmff microsoft.

This is the setting that I have reduced to 5 minutes, on Microsoft's advice to try and stop this from happening. The problem seems to be that the laptop keeps some sort of security context that it doesn't release if the laptop gets disconnected.

I haven't managed to find any information anywhere as to what causes this error and Microsoft support seemed to know nothing about it either. As I know, Mobility manager primarily targets a roaming user and provides her continuous corporate connectivity when she moves across various networks. Is there any update on your issue?

Post back here to let us know if you need further assistance. I have now set the requested logging.

IKE2 VPN Messages - IKEV2 Phase 1(IKE SA) and Phase 2(Child SA) Message Exchanges - Networkers Home

I don't know whether this is going to be a problem with the server or with the client. The error is triggered at the client, and frustratingly can persist for much longer than the mobility settings suggest it should. It can take over 30 minutes for the client to reconnect due to the security context error.

It's frustrating that this issue has persisted since we started to use RRAS and yet no one else ever seems to have had this issue. I have never encountered this problem, so I don't know an answer, but this is what I would do to analyse the problem.

I would trace the 4 ETW providers below on both the server and the client when the problem is occurring. The format of the list below is suitable for use with logman.

If the list is saved in a file called, say, "providers. The remote VPN user should be able to use these commands themselves. As usual, the first trace results might only be useful enough to suggest what else might need to be traced to get nearer to understanding the issue.Under Authentication on the Security tab are two authentication methods that your connection can use:. Additional authentication settings for EAP can be configured by clicking Properties These additional settings depend on which EAP authentication method you have selected Specifically:.

For example, if you are using certificates stored on the local computer rather than smart cards, you can select the Use A Certificate On This Computer option to enable certificates to be used for authenticating VPN connections. Selecting the Valid Server Certificate option forces the client computer to verify that the certificate of the remote VPN server is valid this option is selected by default.

In addition, you can choose whether to configure the connection to automatically use your Windows logon credentials. When you force a connection to use IKEv2 as its tunnel type, you have a choice of two authentication methods from which to select for authenticating the client to the server see Figure :.

The default setting here is to use EAP, which doesn't require a machine certificate to be installed on the client computer. For IKEv2 to work, however, a machine certificate must be installed on the VPN server so that the server's identity can be authenticated by the client.

Note that if you select the Use Machine Certificates option on your client computers running Windows 7, you must also configure your VPN server running Windows Server R2 to support this configuration.

ikev2 network outage time

To do this, follow these steps on the server:. To enable mobility for the connection, click Advanced Settings and make sure the check box is selected see Figure To disable mobility for the connection, clear the check box. The default setting for an IKEv2 connection is for mobility to be enabled. You can also use this dialog box to configure the maximum allowed network outage time for the VPN connection, which can range from 5 minutes to 8 hours the default is 30 minutes.

Managing Inconsistent AOVPN Disconnects

If the underlying Layer 2 network connectivity is interrupted and not restored within the configured network outage time, the VPN connection will be terminated that is, mobility will fail.

Idle Time-out The time in minutes that an IKEv2 client connection 5 minutes Minutes can be idle before it is terminated. Time Minutes retransmitted without a response before the connection is considered lost. Higher values support connection persistence through network outages setting. Windows 7 Help Software.

ikev2 network outage time

Fikru Which authentication method is used when a client computer running?Additional configuration on both the server and the client will be required to ensure adequate security and protection for IKEv2 VPN connections. This information can be obtained by opening an elevated PowerShell command window and running the following command.

Note : A PowerShell script to implement the custom IPsec security policy settings shown above can be downloaded here. To configure this setting, open an elevated PowerShell window and run the following commands. Note: A PowerShell script to implement the root certificate name to accept can be found here.

Additional configuration is required to enable support for CRL checking. Specifically, administrators must enable the RootCertificateNameToAccept parameter guidance above and set the following registry key to enable this functionality. Unfortunately, none of the IKEv2 IPsec security association parameters proposed by default on Windows 10 clients use bit keys DH Group 14so it will be necessary to define a custom IPsec security policy on the client to match the settings configured on the server.

To configure a matching IPsec security policy on an individual Windows 10 VPN client, open an elevated PowerShell command window and run the following command. In the process of testing it may be necessary to restore the default IKEv2 configuration on both the client and the server.

This can be accomplished by running the following PowerShell commands. This is by design, as AES does not provide any practical additional security in most use cases. Details here. Thanks Richard, I cannot wait to test these settings. Oh yes, you can see what IKEv2 security parameters were negotiated using PowerShell after the connection has been made.

Worth noting, in my testing anyway, that the VPN profile CryptographySuite blob needs to be directly under. I tried it above and it failed. It needs to be directly under NativeProfile. I tried it under Authentication and it failed.

ikev2 network outage time

It works for both PowerShell and Intune deployed connections. The important thing to remember is that the settings must also be configured on the server, and they must be identical to the settings on the client or else you will get the policy match error. Be sure to use the exact syntax as defined in the CSP! The only change to each profile was the addition of the cryptography blog under nativeprofile. The powershell command were executed on client and server respectively.

What could it be? After a service re-start. Yes, you can use -RevertToDefault to restore the default settings. Thanks for bringing that up. I am experiencing some odd issues. If I manually run my scripts for the profiles with the powershell to set the policy at the end of the script, the VPN behaves normally.

If I deploy the exact same script through SCCM which worked perfectly fine prior to the IKEv2 policy changes it has all types of odd stuff going on like connected but no traffic flows… or the device tunnel will say connected but traffic wont flow and the user tunnel will say policy mismatch.

Richard, is there anyway to view the IKEv2 policy settings that were applied to the profile with powershell to confirm they were applied properly? Unusual indeed. The ProfileXML can be trick sometimes though. This may have been resolved by adding a Start-Sleep 15 seconds in the profile script prior to executing the IKEv2 policy command.

Richard, what are possible solutions to computers with device tunnels that are in the possession of a terminated employee? I assume because the user tunnel uses NPS it can just be removed from a group and lose access.

But what about the device? That employee is terminated and their user is removed from the group for AOVPN but they still have possession of the device.Specifies the maximum amount of time, in minutes, that an Internet Key Exchange version 2 IKEv2 client connection can be idle before it is terminated. The default value is 5 minutes.

Specifies the maximum amount of time, in minutes, that IKEv2 packets are retransmitted without a response before the connection is considered lost. Higher values support connection persistence through network outages.

The default value is 30 minutes. Specifies the time, in minutes, after which a security association SA expires for IKEv2 client connections. When the SA expires, a new quick mode negotiation must succeed before the two computers can continue to exchange data. The default value is minutes. Specifies the maximum amount of network traffic that can be sent through an SA for an IKEv2 client connection.

The default value is megabytes MB. Toggle navigation. Dialog box element Description Idle time-out minutes Specifies the maximum amount of time, in minutes, that an Internet Key Exchange version 2 IKEv2 client connection can be idle before it is terminated.

Network outage time minutes Specifies the maximum amount of time, in minutes, that IKEv2 packets are retransmitted without a response before the connection is considered lost. Table Of Contents.