Transport Layer Security (TLS) is a security protocol that establishes encryption channels over computer networks. TLS 1.2 is the current industry standard and is supported by Azure Resource Manager. For backwards compatibility, Azure Resource Manager also supports earlier versions, such as TLS 1.0 and 1.1, but that support is ending.
To ensure that Azure is compliant with regulatory requirements, and provide improved security for our customers, Azure Resource Manager will stop supporting protocols older than TLS 1.2 on September 30, 2024.
This article provides guidance for removing dependencies on older security protocols.
Why migrate to TLS 1.2
TLS encrypts data sent over the internet to prevent malicious users from accessing private, sensitive information. The client and server perform a TLS handshake to verify each other's identity and determine how they'll communicate. During the handshake, each party identifies which TLS versions they use. The client and server can communicate if they both support a common version.
TLS 1.2 is more secure and faster than its predecessors.
Azure Resource Manager is the deployment and management service for Azure. You use Azure Resource Manager to create, update, and delete resources in your Azure account. To strengthen security and mitigate against any future protocol downgrade attacks, Azure Resource Manager will no longer support TLS 1.1 or earlier. To continue using Azure Resource Manager, make sure all of your clients that call Azure use TLS 1.2 or later.
Prepare for migration to TLS 1.2
We recommend the following steps as you prepare to migrate your clients to TLS 1.2:
Update your operating system to the latest version.
Update your development libraries and frameworks to their latest versions. For example, Python 3.8 supports TLS 1.2.
Fix hardcoded instances of security protocols older than TLS 1.2.
Windows Server 2016+ has TLS 1.2 enabled by default.
When possible, avoid hardcoding the protocol version. Instead, configure your applications to always defer to your operating system's default TLS version.
For example, you can enable the SystemDefaultTLSVersion flag in .NET Framework applications to defer to your operating system's default version. This approach lets your applications take advantage of future TLS versions.
If you can't avoid hardcoding, specify TLS 1.2.
Upgrade applications that target .NET Framework 4.5 or earlier. Instead, use .NET Framework 4.7 or later because these versions support TLS 1.2.
For example, Visual Studio 2013 doesn't support TLS 1.2. Instead, use at least the latest release of Visual Studio 2017.
You can use Qualys SSL Labs to identify which TLS version is requested by clients connecting to your application.
You can use Fiddler to identify which TLS version your client uses when you send out HTTPS requests.
Transport Layer Security (TLS) is a security protocol that establishes encryption channels over computer networks. TLS 1.2 is the current industry standard and is supported by Azure Resource Manager.
For more information about TLS, see Transport Layer Security. Azure Storage currently supports three versions of the TLS protocol: 1.0, 1.1, and 1.2. Azure Storage uses TLS 1.2 on public HTTPS endpoints, but TLS 1.0 and TLS 1.1 are still supported for backward compatibility.
The minimum Transport Layer Security (TLS) version setting allows customers to choose which version of TLS their SQL database uses. It's possible to change the minimum TLS version by using the Azure portal, Azure PowerShell, and the Azure CLI. Currently, Azure SQL Database supports TLS 1.0, 1.1, 1.2, and 1.3.
Based on TLS 1.1, TLS 1.2 was released by the IETF in 2008 with the RFC-5246. To date, it's the most commonly used TLS protocol version. It's supported by 99.9% of the websites analyzed by SSL Labs (as of January 2023). Yup.
TLS 1.3 is not directly compatible with previous versions. Although TLS 1.3 can be implemented with a backward-compatibility mode, there are still several compatibility risks to consider when upgrading to TLS 1.3: TLS 1.3 uses a half-close policy, while TLS 1.2 and earlier use a duplex-close policy.
While TLS 1.3 is more secure, not all devices, browsers, and servers support it. This means that if you are using TLS 1.3, some users may not be able to access your website or service, which can lead to decreased user engagement and potentially lost business.
TLS 1.3 is not enabled in Windows 10 by default. If you are using network apps that require or support TLS 1.3, you should enable TLS 1.3 in Windows 10. In Windows 10, click [Search] on the [Taskbar]. Enter [regedit] and then you will find [Registry Editor] here.
In the Windows menu search box, type Internet options. Under Best match, click Internet Options. In the Internet Properties window, on the Advanced tab, scroll down to the Security section. Check the User TLS 1.2 checkbox.
Enter the URL you wish to check in the browser. Right-click the page or select the Page drop-down menu, and select Properties.In the new window, look for the Connection section. This will describe the version of TLS or SSL used.
Minimum TLS Version only allows HTTPS connections from visitors that support the selected TLS protocol version or newer. For example, if TLS 1.1 is selected, visitors attempting to connect using TLS 1.0 will be rejected. Visitors attempting to connect using TLS 1.1, 1.2, or 1.3 (if enabled) will be allowed to connect.
TLS has gone through many iterations, with version 1.2 being defined in RFC 5246. Microsoft Entra Connect version 1.2.65.0 and later now fully support using only TLS 1.2 for communications with Azure. This article provides information about how to force your Microsoft Entra Connect server to use only TLS 1.2.
Azure Event Hubs will require a minimum TLS version of 1.2 for all deployments as of October 31, 2024. You can set the TLS version for your Event Hubs namespace to enforce stricter security measures and require that clients send and receive data with a newer version of TLS.
Introduction: My name is Kelle Weber, I am a magnificent, enchanting, fair, joyous, light, determined, joyous person who loves writing and wants to share my knowledge and understanding with you.
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