# Associate DNS aliases with your file system
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You can associate DNS aliases with existing FSx for Windows File Server file systems, when you create new file systems, and when you create a new file system from a backup using the Amazon FSx console, CLI, and API. If you are creating an alias with a different domain name, input the full name, including parent domain, to associate an alias.

This procedure describes how to associate DNS aliases when creating a new file system using the Amazon FSx console. For information about associating DNS aliases with existing file systems, and details about using the CLI and API, see [Managing DNS aliases](managing-dns-aliases.md).

**To associate DNS aliases when creating a new file system**

1. Open the Amazon FSx console at [https://console.amazonaws.cn/fsx/](https://console.amazonaws.cn/fsx/).

1. Follow the procedure for creating a new file system as described in [Step 5. Create your file system](getting-started.md#getting-started-step1) of the Getting Started section.

1. In the **Access - optional** section of the **Create file system** wizard, enter the DNS aliases that you want to associate with your file system.

   Use the following guidelines when specifying DNS aliases:
   + Must be formatted as a fully qualified domain name (FQDN) `hostname.domain`, for example, `accounting.example.com`.
   + Can contain alphanumeric characters and hyphens (‐).
   + Cannot start or end with a hyphen.
   + Can start with a numeric.

   For DNS alias names, Amazon FSx stores alphabetic characters as lowercase letters (a-z), regardless of how you specify them: as uppercase letters, lowercase letters, or the corresponding letters in escape codes.

1. For **Maintenance preferences**, make any changes that you want.

1. In the **Tags - optional** section, add any tags that you need, and then choose **Next**.

1. Review the file system configuration shown on the **Create file system** page. Choose **Create file system** to create the file system.