Windows Server

Windows Server 2008 : Configuring IIS Security (part 8) - Adding Handler Mappings

12/12/2010 9:06:49 AM
Managing Handler Inheritance

The inheritance feature of handler mapping settings can simplify the administration of servers significantly that host many Web sites and Web applications. In general, configure handler mappings at the highest applicable level. For example, if you are sure that none of the Web applications in a specific Web site will need to respond to the .soap file extension, you can remove this handler mapping at the level of the Web site. As mentioned earlier, to increase security, minimize the numbers and types of handlers that are enabled.

By default, it is possible for lower-level objects on the Web server to override handler mapping settings from parent objects. In some cases, you might want to prevent some types of requests from being processed on the entire server, regardless of settings for Web sites and Web applications. You do this by locking the configuration of the request handler. To lock the configuration, click the Web server object in IIS Manager, and then double-click Handler Mappings. Select the handler mapping you wish to lock, and then click the Lock command in the Actions pane.

It is also possible to restore the handler mappings settings to their default values. To do this, click the Revert To Inherited command in the Actions pane in IIS Manager. Performing this action will restore mappings from the parent object, but it will also result in the loss of any locally defined handler mappings.

Adding Handler Mappings

The architecture of IIS enables systems administrators to add new handler mappings based on specific needs. For example, if you want to provide support for a type of file that has a .mypage extension, you can add a handler for this path type. Additionally, Web developers can create their own programs to manage new types of requests.

To add a handler mapping, select the appropriate object, and then double-click Handler Mappings in the Features View in IIS Manager. The Actions pane contains several options for adding new types of request handlers. They are:

  • Add Managed Handler A managed handler processes requests based on a .NET-based code library. The Type setting enables you to choose from the existing .NET code modules registered on the local server, as shown in Figure 15. These types of options all belong to the System.Web namespace.

    Figure 15. Adding a manager handler for a Web site

  • Add Script Map Scripting mappings are used to send request processing to a Dynamic Link Library (DLL) or executable (.exe) file type. These types of programs are designed to process request information and generate a response for IIS to send back to the end user.

  • Add Wildcard Script Map Wildcard script mappings are used to specify a default handler for types of documents that are not managed by other handlers. The Executable path option points to either a .dll or an .exe file designed to handle requests.

  • Add Module Mapping Modules are programs designed to integrate with the IIS request processing pipeline. They can provide a wide range of functions and are included with the default and optional role services that are part of the Web Server (IIS) role. Examples include the FastCGIModule, for processing scripts based on the Common Gateway Interface (CGI) specification, and StaticCompressionModule, which compresses static HTML content to reduce bandwidth usage. In addition to specifying the module that will be used for processing, administrators can define an optional executable or .dll file that will be used when processing requests, as shown in Figure 16.

Figure 16. Adding a module mapping to a Web application

When you add a new request handler, you will be prompted to provide information about the request path. You can use wildcards, or you can specify a list of specific files. Examples include *.mypage (for responding to a request for any file with this extension) and Config.mypage (for responding to requests for this specific filename). You use the Name setting to help other developers and administrators identify the purpose of the handler mapping.

Other -----------------
- Windows Server 2008 Server Core : Performing Server Updates
- Windows Server 2008 Server Core : Deciding How to Perform Maintenance
- Windows Server 2008 Server Core : Performing Application Installations
- Configuring Internet Information Services (part 7)
- Configuring Internet Information Services (part 6) - Migrating From IIS 6.0
- Configuring Internet Information Services (part 5) - Managing Web Server Configuration Files
- Configuring Internet Information Services (part 4)
- Configuring Internet Information Services (part 3) - Understanding Web Applications
- Configuring Internet Information Services (part 2) - Creating and Configuring Web Sites
- Configuring Internet Information Services (part 1) - Working with IIS Management Tools
- Windows Server 2008 : Installing the Web Server Role (part 9) - Using Windows System Resource Manager
- Windows Server 2008 : Installing the Web Server Role (part 8)
- Windows Server 2008 : Installing the Web Server Role (part 7)
- Windows Server 2008 : Installing the Web Server Role (part 6)
- Windows Server 2008 : Installing the Web Server Role (part 5)
- Windows Server 2008 : Installing the Web Server Role (part 4)
- Windows Server 2008 : Installing the Web Server Role (part 3)
- Windows Server 2008 : Installing the Web Server Role (part 2)
- Windows Server 2008 : Installing the Web Server Role (part 1)
- Windows Server 2008 : Recovering Role Services and Features (part 4)
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