![]() Note Some domain registrars only allow you to map subdomains when using a CNAME record, such as and not root names, such as. service automatically, so if the IP address of the cloud service changes, you do not have to take any action. The CNAME entry will resolve to the IP address of your. Once created, the CNAME creates an alias for the. domain name of your Azure hosted application. ![]() ![]() In the case of Azure Cloud Services, the canonical domain name is the. If the IP address of the web app changes, you do not have to take any action. They will only see the custom domain name in their browser. This is completely transparent to visitors to your web app. Once traffic arrives at Traffic Manager, it then routes the traffic to your web app, using the load balancing method it is configured for. domain name of your Traffic Manager profile. In the case of Azure web apps using Traffic Manager, the canonical domain name is the. Information for Azure Web Apps that use Traffic Manager In the case of Azure Web Apps, the canonical domain name is the. CNAME or Alias recordĪ CNAME record maps a specific DNS name, such as or to another (canonical) domain name. There are also multiple types of records, each with their own functions and limitations, but for Azure web apps configured to as Traffic Manager endpoints, we only care about one CNAME record. You can only use CNAME records with Traffic Manager. Note When your Azure web app is configured as a Traffic Manager endpoint, you will use the. When you add your Azure web app as an Azure Traffic Manager endpoint, your web app is then accessible through the. There are also multiple types of records, each with their own functions and limitations, but for Azure web apps we only care about two A and CNAME records. Note The IP address of your Azure web app will change if you delete and recreate your Azure web app, or change the Azure App Service plan to free after it has been set to Basic, Shared, Standard, or Premium. There is also a virtual IP address available for use when creating DNS records, so you can either create records that point to the. When you create an Azure web app, a DNS name is automatically assigned to the web app. Ultimately, all name resolution will end in an IP address. If it points to another DNS name, then the application has to do resolution again. If the value it points to is an IP address, the browser will use that value. When an application, such as a web browser, looks up a name in DNS, it finds the record, and uses whatever it points to as the address. Records associate a specific name, such as, with either an IP address or another DNS name. For example, it is much easier to remember a DNS name like than it is to remember an IP address such as 192.168.1.88 or 2001:0:4137:1f67:24a2:3888:9cce:fea3. The IP address is sort of like a street address, but it's not very human friendly. For example, when you enter a web site address in your browser, or click a link on a web page, it uses DNS to translate the domain into an IP address. ![]() The Domain Name System (DNS) is used to locate resources on the internet. Understanding DNS records About DNS records To learn how the association works for a custom domain name from a specific domain registrar, select your domain registrar to proceed. Here is a video that shows generally how to hook up a custom CNAME DNS Record to an Azure web app and how long it takes for DNS to propagate. See App Service Pricing Details for more information. You must configure your Azure App Service plan to use Shared, Basic, Standard, or Premium, which may change how much you are billed for your subscription. Note Custom domain names cannot be used with Free Azure web apps. When you create a web app, Microsoft Azure provides a friendly subdomain on the domain so your users can access your Azure web app using a URL like You can also associate a custom domain name purchased from your domain registrar, such as, with your Azure web app in order to provide a more recognizable domain name for your users. If you have questions about any of these areas, click the "Go to the Prerequisite knowledge page" option at the end of the page. It also assumes that if you are using Azure web apps, you have a basic understanding of Azure App Service plan (Free, Shared, Basic, Standard and Premium). This guide assumes that you have background knowledge of DNS records.
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