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Configure a Point-to-Site connection to a VNet using native Azure certificate authentication: Azure portal. 27 minutes to read.
Contributors. In this article This article helps you securely connect individual clients running Windows, Linux, or Mac OS X to an Azure VNet.
Point-to-Site VPN connections are useful when you want to connect to your VNet from a remote location, such when you are telecommuting from home or a conference. You can also use P2S instead of a Site-to-Site VPN when you have only a few clients that need to connect to a VNet. Point-to-Site connections do not require a VPN device or a public-facing IP address.
P2S creates the VPN connection over either SSTP (Secure Socket Tunneling Protocol), or IKEv2. For more information about Point-to-Site VPN, see. Architecture Point-to-Site native Azure certificate authentication connections use the following items, which you configure in this exercise:. A RouteBased VPN gateway. The public key (.cer file) for a root certificate, which is uploaded to Azure.
Once the certificate is uploaded, it is considered a trusted certificate and is used for authentication. A client certificate that is generated from the root certificate. The client certificate installed on each client computer that will connect to the VNet.
This certificate is used for client authentication. A VPN client configuration. The VPN client configuration files contain the necessary information for the client to connect to the VNet. The files configure the existing VPN client that is native to the operating system. Each client that connects must be configured using the settings in the configuration files. Example values You can use the following values to create a test environment, or refer to these values to better understand the examples in this article:. VNet Name: VNet1.
Address space: 192.168.0.0/16 For this example, we use only one address space. You can have more than one address space for your VNet. Subnet name: FrontEnd. Subnet address range: 192.168.1.0/24.
Subscription: If you have more than one subscription, verify that you are using the correct one. Resource Group: TestRG.
Location: East US. GatewaySubnet: 192.168.200.0/24. DNS Server: (optional) IP address of the DNS server that you want to use for name resolution.
Virtual network gateway name: VNet1GW. Gateway type: VPN.
VPN type: Route-based. Public IP address name: VNet1GWpip. Connection type: Point-to-site. Client address pool: 172.16.201.0/24 VPN clients that connect to the VNet using this Point-to-Site connection receive an IP address from the client address pool. Create a virtual network Before beginning, verify that you have an Azure subscription. If you don't already have an Azure subscription, you can activate your or sign up for a. To create a VNet in the Resource Manager deployment model by using the Azure portal, follow the steps below.
The screenshots are provided as examples. Be sure to replace the values with your own. For more information about working with virtual networks, see the. Note If you want this VNet to connect to an on-premises location (in addition to creating a P2S configuration), you need to coordinate with your on-premises network administrator to carve out an IP address range that you can use specifically for this virtual network. If a duplicate address range exists on both sides of the VPN connection, traffic does not route the way you may expect it to.
Additionally, if you want to connect this VNet to another VNet, the address space cannot overlap with other VNet. Take care to plan your network configuration accordingly. From a browser, navigate to the and, if necessary, sign in with your Azure account. In the Search the marketplace field, type 'Virtual Network'. Locate Virtual Network from the returned list and click to open the Virtual Network page. Near the bottom of the Virtual Network page, from the Select a deployment model list, select Resource Manager, and then click Create.
On the Create virtual network page, configure the VNet settings. When you fill in the fields, the red exclamation mark becomes a green check mark when the characters entered in the field are valid.
There may be values that are auto-filled. If so, replace the values with your own. The Create virtual network page looks similar to the following example:. Name: Enter the name for your Virtual Network.
Address space: Enter the address space. If you have multiple address spaces to add, add your first address space. You can add additional address spaces later, after creating the VNet.
Subscription: Verify that the Subscription listed is the correct one. You can change subscriptions by using the drop-down.
Resource group: Select an existing resource group, or create a new one by typing a name for your new resource group. If you are creating a new group, name the resource group according to your planned configuration values. For more information about resource groups, visit. Location: Select the location for your VNet. The location determines where the resources that you deploy to this VNet will reside. Subnet: Add the subnet name and subnet address range.
You can add additional subnets later, after creating the VNet. Select Pin to dashboard if you want to be able to find your VNet easily on the dashboard, and then click Create. After clicking Create, you will see a tile on your dashboard that will reflect the progress of your VNet. The tile changes as the VNet is being created. Add a gateway subnet Before connecting your virtual network to a gateway, you first need to create the gateway subnet for the virtual network to which you want to connect. The gateway services use the IP addresses specified in the gateway subnet. If possible, create a gateway subnet using a CIDR block of /28 or /27 to provide enough IP addresses to accommodate additional future configuration requirements.
In the, navigate to the Resource Manager virtual network for which you want to create a virtual network gateway. In the Settings section of your VNet page, click Subnets to expand the Subnets page. On the Subnets page, click +Gateway subnet to open the Add subnet page.
The Name for your subnet is automatically filled in with the value 'GatewaySubnet'. This value is required in order for Azure to recognize the subnet as the gateway subnet. Adjust the auto-filled Address range values to match your configuration requirements. Don't configure Route table or Service endpoints. Click OK at the bottom of the page to create the subnet.
Specify a DNS server (optional) After you create your virtual network, you can add the IP address of a DNS server to handle name resolution. The DNS server is optional for this configuration, but required if you want name resolution. Specifying a value does not create a new DNS server. The DNS server IP address that you specify should be a DNS server that can resolve the names for the resources you are connecting to. For this example, we used a private IP address, but it is likely that this is not the IP address of your DNS server. Be sure to use your own values.
The value you specify is used by the resources that you deploy to the VNet, not by the P2S connection or the VPN client. In the Settings section of your virtual network page, select DNS servers to open the DNS servers page.
On the DNS servers page, fill in the following values:. DNS servers: Select Custom. Add DNS server: Enter the IP address of the DNS server that you want to use for name resolution. When you're done adding DNS servers, select Save.
Create a virtual network gateway. In the portal, on the left side, click + Create a resource and type 'Virtual Network Gateway' in search. Locate Virtual network gateway in the search return and click the entry.
On the Virtual network gateway page, click Create at the bottom of the page. This opens the Create virtual network gateway page. On the Create virtual network gateway page, fill in the values for your virtual network gateway. On the Create virtual network gateway page, specify the values for your virtual network gateway. Name: Name your gateway.
This is not the same as naming a gateway subnet. It's the name of the gateway object you are creating.
Gateway type: Select VPN. VPN gateways use the virtual network gateway type VPN. VPN type: Select the VPN type that is specified for your configuration. Most configurations require a Route-based VPN type. SKU: Select the gateway SKU from the dropdown.
The SKUs listed in the dropdown depend on the VPN type you select. For more information about gateway SKUs, see. Only select Enable active-active mode if you are creating an active-active gateway configuration. Otherwise, leave this setting unselected.
Location: You may need to scroll to see Location. Adjust the Location field to point to the location where your virtual network is located.
For example, West US. If the location is not pointing to the region where your virtual network resides, when you select a virtual network in the next step, it will not appear in the drop-down list. Virtual network: Choose the virtual network to which you want to add this gateway. Click Virtual network to open the 'Choose a virtual network' page.
Select the VNet. If you don't see your VNet, make sure the Location field is pointing to the region in which your virtual network is located. Gateway subnet address range: You will only see this setting if you did not previously create a gateway subnet for your virtual network.
If you previously created a valid gateway subnet, this setting will not appear. Public IP address: This setting specifies the public IP address object that gets associated to the VPN gateway. The public IP address is dynamically assigned to this object when the VPN gateway is created. VPN Gateway currently only supports Dynamic Public IP address allocation. However, this does not mean that the IP address changes after it has been assigned to your VPN gateway. The only time the Public IP address changes is when the gateway is deleted and re-created. It doesn't change across resizing, resetting, or other internal maintenance/upgrades of your VPN gateway.
Leave Create new selected. In the text box, type a Name for your public IP address. Leave Configure BGP ASN deselected, unless your configuration specifically requires this setting.
If you do require this setting, the default ASN is 65515, although this can be changed. Verify the settings. You can select Pin to dashboard at the bottom of the page if you want your gateway to appear on the dashboard. Click Create to begin creating the VPN gateway.
The settings are validated and you'll see the 'Deploying Virtual network gateway' tile on the dashboard. Creating a gateway can take up to 45 minutes. You may need to refresh your portal page to see the completed status. After the gateway is created, view the IP address that has been assigned to it by looking at the virtual network in the portal.
The gateway appears as a connected device. You can click the connected device (your virtual network gateway) to view more information. Note The Basic SKU does not support IKEv2 or RADIUS authentication. If you are planning on having Mac clients connect to your virtual network, do not use the Basic SKU. Generate certificates Certificates are used by Azure to authenticate clients connecting to a VNet over a Point-to-Site VPN connection.
Once you obtain a root certificate, you the public key information to Azure. The root certificate is then considered 'trusted' by Azure for connection over P2S to the virtual network. You also generate client certificates from the trusted root certificate, and then install them on each client computer. The client certificate is used to authenticate the client when it initiates a connection to the VNet. Obtain the.cer file for the root certificate Use either a root certificate that was generated with an enterprise solution (recommended), or generate a self-signed certificate. After you create the root certificate, export the public certificate data (not the private key) as a Base64 encoded X.509.cer file. Then, upload the public certificate data to the Azure server.
Enterprise certificate: If you're using an enterprise solution, you can use your existing certificate chain. Acquire the.cer file for the root certificate that you want to use. Self-signed root certificate: If you aren't using an enterprise certificate solution, create a self-signed root certificate. Otherwise, the certificates you create won't be compatible with your P2S connections and clients will receive a connection error when they try to connect. You can use Azure PowerShell, MakeCert, or OpenSSL.
The steps in the following articles describe how to generate a compatible self-signed root certificate:.: These instructions require Windows 10 and PowerShell to generate certificates. Client certificates that are generated from the root certificate can be installed on any supported P2S client.: Use MakeCert if you don't have access to a Windows 10 computer to use to generate certificates. Although MakeCert is deprecated, you can still use it to generate certificates.
Client certificates that you generate from the root certificate can be installed on any supported P2S client. Generate a client certificate Each client computer that you connect to a VNet with a Point-to-Site connection must have a client certificate installed.
You generate it from the root certificate and install it on each client computer. If you don't install a valid client certificate, authentication will fail when the client tries to connect to the VNet. You can either generate a unique certificate for each client, or you can use the same certificate for multiple clients.
The advantage to generating unique client certificates is the ability to revoke a single certificate. Otherwise, if multiple clients use the same client certificate to authenticate and you revoke it, you'll need to generate and install new certificates for every client that uses that certificate. You can generate client certificates by using the following methods:. Enterprise certificate:. If you're using an enterprise certificate solution, generate a client certificate with the common name value format [email protected].
Use this format instead of the domain name username format. Make sure the client certificate is based on a user certificate template that has Client Authentication listed as the first item in the user list. Check the certificate by double-clicking it and viewing Enhanced Key Usage in the Details tab. Self-signed root certificate: Follow the steps in one of the following P2S certificate articles so that the client certificates you create will be compatible with your P2S connections. The steps in these articles generate a compatible client certificate:.: These instructions require Windows 10 and PowerShell to generate certificates. The generated certificates can be installed on any supported P2S client.: Use MakeCert if you don't have access to a Windows 10 computer for generating certificates.
Although MakeCert is deprecated, you can still use it to generate certificates. You can install the generated certificates on any supported P2S client. When you generate a client certificate from a self-signed root certificate, it's automatically installed on the computer that you used to generate it. If you want to install a client certificate on another client computer, export it as a.pfx file, along with the entire certificate chain. Doing so will create a.pfx file that contains the root certificate information required for the client to authenticate.
For steps to export a certificate, see. Add the client address pool The client address pool is a range of private IP addresses that you specify. The clients that connect over a Point-to-Site VPN dynamically receive an IP address from this range. Use a private IP address range that does not overlap with the on-premises location that you connect from, or the VNet that you want to connect to. Once the virtual network gateway has been created, navigate to the Settings section of the virtual network gateway page. In the Settings section, click Point-to-site configuration. Click Configure now to open the configuration page.
On the Point-to-site configuration page, in the Address pool box, add the private IP address range that you want to use. VPN clients dynamically receive an IP address from the range that you specify. Click Save to validate and save the setting. Note If you don't see Tunnel type or Authentication type in the portal on this page, your gateway is using the Basic SKU. The Basic SKU does not support IKEv2 or RADIUS authentication.
Configure tunnel type You can select the tunnel type. The two tunnel options are SSTP and IKEv2. The strongSwan client on Android and Linux and the native IKEv2 VPN client on iOS and OSX will use only IKEv2 tunnel to connect. Windows clients try IKEv2 first and if that doesn’t connect, they fall back to SSTP.
You can choose to enable one of them or both. Select the checkboxes that your solution requires. Configure authentication type Select Azure certificate. Upload the root certificate public certificate data You can upload additional trusted root certificates up to a total of 20. Once the public certificate data is uploaded, Azure can use it to authenticate clients that have installed a client certificate generated from the trusted root certificate. Upload the public key information for the root certificate to Azure.
Certificates are added on the Point-to-site configuration page in the Root certificate section. Make sure that you exported the root certificate as a Base-64 encoded X.509 (.cer) file. You need to export the certificate in this format so you can open the certificate with text editor. Open the certificate with a text editor, such as Notepad. When copying the certificate data, make sure that you copy the text as one continuous line without carriage returns or line feeds. You may need to modify your view in the text editor to 'Show Symbol/Show all characters' to see the carriage returns and line feeds.
Copy only the following section as one continuous line:. Paste the certificate data into the Public Certificate Data field. Name the certificate, and then click Save. You can add up to 20 trusted root certificates. Click Save at the top of the page to save all of the configuration settings.
Install an exported client certificate If you want to create a P2S connection from a client computer other than the one you used to generate the client certificates, you need to install a client certificate. When installing a client certificate, you need the password that was created when the client certificate was exported. Make sure the client certificate was exported as a.pfx along with the entire certificate chain (which is the default). Otherwise, the root certificate information isn't present on the client computer and the client won't be able to authenticate properly.
For install steps, see. Generate and install the VPN client configuration package The VPN client configuration files contain settings to configure devices to connect to a VNet over a P2S connection. For instructions to generate and install VPN client configuration files, see. Connect to Azure To connect from a Windows VPN client. Note Starting July 1, 2018, support is being removed for TLS 1.0 and 1.1 from Azure VPN Gateway. VPN Gateway will support only TLS 1.2.
To maintain support, see the. Additionally, the following legacy algorithms will also be deprecated for TLS on July 1, 2018:. RC4 (Rivest Cipher 4).
DES (Data Encryption Algorithm). 3DES (Triple Data Encryption Algorithm). MD5 (Message Digest 5) How do I enable support for TLS 1.2 in Windows 7 and Windows 8.1?.
Open a command prompt with elevated privileges by right-clicking on Command Prompt and selecting Run as administrator. Run the following commands in the command prompt: reg add HKLM SYSTEM CurrentControlSet Services RasMan PPP EAP 13 /v TlsVersion /t REGDWORD /d 0xfc0 reg add 'HKLM SOFTWARE Microsoft Windows CurrentVersion Internet Settings WinHttp' /v DefaultSecureProtocols /t REGDWORD /d 0xaa0 if%PROCESSORARCHITECTURE% EQU AMD64 reg add 'HKLM SOFTWARE Wow6432Node Microsoft Windows CurrentVersion Internet Settings WinHttp' /v DefaultSecureProtocols /t REGDWORD /d 0xaa0. Install the following updates:.
Reboot the computer. Connect to the VPN.
Can I traverse proxies and firewalls using Point-to-Site capability? Azure supports two types of Point-to-site VPN options:. Secure Socket Tunneling Protocol (SSTP). SSTP is a Microsoft proprietary SSL-based solution that can penetrate firewalls since most firewalls open the TCP port that 443 SSL uses. IKEv2 VPN is a standards-based IPsec VPN solution that uses UDP port 500 and 4500 and IP protocol no. Firewalls do not always open these ports, so there is a possibility of IKEv2 VPN not being able to traverse proxies and firewalls. If I restart a client computer configured for Point-to-Site, will the VPN automatically reconnect?
By default, the client computer will not reestablish the VPN connection automatically. Does Point-to-Site support auto-reconnect and DDNS on the VPN clients? Auto-reconnect and DDNS are currently not supported in Point-to-Site VPNs. Can I have Site-to-Site and Point-to-Site configurations coexist for the same virtual network?
For the Resource Manager deployment model, you must have a RouteBased VPN type for your gateway. For the classic deployment model, you need a dynamic gateway. We do not support Point-to-Site for static routing VPN gateways or PolicyBased VPN gateways. Can I configure a Point-to-Site client to connect to multiple virtual networks at the same time? A Point-to-Site client can only connect to resources in the VNet in which the virtual network gateway resides.
How much throughput can I expect through Site-to-Site or Point-to-Site connections? It's difficult to maintain the exact throughput of the VPN tunnels. IPsec and SSTP are crypto-heavy VPN protocols. Throughput is also limited by the latency and bandwidth between your premises and the Internet. For a VPN Gateway with only IKEv2 Point-to-Site VPN connections, the total throughput that you can expect depends on the Gateway SKU. For more information on throughput, see. Can I use any software VPN client for Point-to-Site that supports SSTP and/or IKEv2?
You can only use the native VPN client on Windows for SSTP, and the native VPN client on Mac for IKEv2. Refer to the list of supported client operating systems. Does Azure support IKEv2 VPN with Windows? IKEv2 is supported on Windows 10 and Server 2016. However, in order to use IKEv2, you must install updates and set a registry key value locally. OS versions prior to Windows 10 are not supported and can only use SSTP.
To prepare Windows 10 or Server 2016 for IKEv2:. Install the update. OS version Date Number/Link Windows Server 2016 Windows 10 Version 1607 January 17, 2018 Windows 10 Version 1703 January 17, 2018. Set the registry key value. Create or set “HKEYLOCALMACHINE SYSTEM CurrentControlSet Services RasMan IKEv2 DisableCertReqPayload” REGDWORD key in the registry to 1. What happens when I configure both SSTP and IKEv2 for P2S VPN connections?
When you configure both SSTP and IKEv2 in a mixed environment (consisting of Windows and Mac devices), the Windows VPN client will always try IKEv2 tunnel first, but will fall back to SSTP if the IKEv2 connection is not successful. MacOSX will only connect via IKEv2. Other than Windows and Mac, which other platforms does Azure support for P2S VPN?
Azure supports Windows, Mac and Linux for P2S VPN. I already have an Azure VPN Gateway deployed. Can I enable RADIUS and/or IKEv2 VPN on it? Yes, you can enable these new features on already deployed gateways using Powershell or the Azure portal, provided that the gateway SKU that you are using supports RADIUS and/or IKEv2. For example, the VPN gateway Basic SKU does not support RADIUS or IKEv2. Can I use my own internal PKI root CA for Point-to-Site connectivity?
Previously, only self-signed root certificates could be used. You can still upload 20 root certificates. What tools can I use to create certificates? You can use your Enterprise PKI solution (your internal PKI), Azure PowerShell, MakeCert, and OpenSSL. Are there instructions for certificate settings and parameters?. Internal PKI/Enterprise PKI solution: See the steps to.
Azure PowerShell: See the article for steps. MakeCert: See the article for steps. OpenSSL:. When exporting certificates, be sure to convert the root certificate to Base64. For the client certificate:.
When creating the private key, specify the length as 4096. When creating the certificate, for the -extensions parameter, specify usrcert. Next steps Once your connection is complete, you can add virtual machines to your virtual networks. For more information, see.
To understand more about networking and virtual machines, see. For P2S troubleshooting information,.
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