When migrating a website to IIS 10, you need to pay attention to the following steps: 1. Confirm that the target server is Windows Server 2016 and above and install the corresponding .NET Framework version; 2. Enable IIS roles and required subcomponents such as CGI, ISAPI extensions, etc.; 3. Use the Web Deploy tool to export the old site and import the new server, or manually copy the file to configure binding and permissions; 4. Check whether the .NET CLR version of the application pool matches the pipeline pattern; 5. Test website access, verify custom error pages, URL rewrite rules, MIME type and HTTP response headers; 6. Configure NTFS permissions, and recommend using "application pool identity" and combining the principle of minimum permissions; 7. Set request filtering and IP restrictions as needed to enhance security; 8. Re-import and configure SSL certificates and related binding information. Just follow the steps and focus on compatibility and security settings, and the migration process will be completed smoothly.

Migrating a website from an older version of IIS to IIS 10 is actually not complicated, but some key points need to be paid attention to. If you were using IIS 6, 7, or 8 before, when upgrading to IIS 10 running on Windows Server, in addition to basic configuration transfer, you also need to consider compatibility, functional changes, and security settings.

Ensure that the server environment meets the requirements

Before starting the migration, confirm whether your target server supports IIS 10. IIS 10 is available with Windows Server 2016 and subsequent versions, so you need at least one of these operating systems. At the same time, make sure the .NET Framework version also meets the needs, especially if your site relies on ASP.NET.

• Check the .NET version of the current application
• Install the corresponding version of the runtime library (such as .NET 3.5 SP1, 4.x)
• Enable the IIS role and install necessary subcomponents (such as CGI, ISAPI extensions, etc.)

Some older IIS features are not enabled by default in IIS 10, such as classic pipeline mode or some legacy modules, which need to be manually turned on.

Migrate website files and configurations

The most direct way is to copy the website files to the corresponding directory of the new server and then create a new site through IIS Manager. However, it is more recommended to use the Web Deploy tool for migration, which can automatically handle configuration, permissions, and dependencies.

Common practices include:

• Export old sites as packages using Web Deploy
• Import the package on the new server and automatically restore the settings
• Check whether the application pool configuration matches (for example, .NET CLR version, managed pipeline mode)

Note: If you create a site manually, remember to check whether the binding information, physical path permissions, and application pool settings are consistent.

Testing and compatibility adjustments

After the migration is completed, the first thing is to test whether the website can be accessed normally. In particular, some old projects may experience exceptions due to IIS 10 default security policy or module behavior changes.

You can focus on the following aspects:

• Is the custom error page displayed normally?
• Is the URL rewrite rule still valid
• Whether the necessary MIME type or HTTP response header is enabled
• If you are using FTP or other protocols, make sure that the relevant services are correctly configured

If you encounter 500 errors or the page is blank, it is recommended to view the event viewer and IIS log to locate specific problems.

Do not ignore permissions and security settings

IIS 10 has more stringent permission control, especially when it comes to application pool authentication. Many old projects may be used to using LocalSystem or NetworkService , but in new environments, the "App pool ID" is recommended to use with the minimum permission principle.

• Set the correct NTFS folder access permissions
• Configure application pool to use a dedicated account (optional)
• Turn on request filtering, IP address restriction and other functions to improve security

Additionally, SSL configurations may require reimporting the certificate and updating the binding settings.

Basically that's it. Although there are many steps in the migration process, each step is not difficult. The key is that the details must be in place. As long as you prepare in advance, most old projects can be moved to IIS 10 to run smoothly.

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