以下示例 Web.config 文件将配置两个选项。 它将配置请求筛选以允许 WebDAV 访问所有文件扩展名，并将 IIS 配置为拒绝对文件扩展名为 .inc 的文件的访问，这些文件有时被用作应用程序的包含文件。

<configuration>
   <system.webServer>
      <security>
         <requestFiltering>
            <fileExtensions applyToWebDAV="false">
               <add fileExtension=".inc" allowed="false" />
            </fileExtensions>
         </requestFiltering>
      </security>
   </system.webServer>
</configuration>
以下代码示例将向默认网站的文件扩展名列表添加一个条目，该条目将拒绝访问扩展名为 .inc 的所有文件，这些文件有时被用作应用程序的包含文件，它们将配置请求筛选以允许 WebDAV 访问隐藏段。
若要使用相同的示例来允许访问，请将每个示例中的 allowed 属性的值设置为 true，而不是 false。
AppCmd.exe
appcmd.exe set config "Default Web Site" -section:system.webServer/security/requestFiltering /fileExtensions.applyToWebDAV:"False"
appcmd.exe set config "Default Web Site" -section:system.webServer/security/requestFiltering /+"fileExtensions.[fileExtension='.inc',allowed='False']"
PowerShell
Start-IISCommitDelay
$fileExtensions = Get-IISConfigSection -CommitPath 'Default Web Site' -SectionPath 'system.webServer/security/requestFiltering' | Get-IISConfigCollection -CollectionName 'fileExtensions'
New-IISConfigCollectionElement -ConfigCollection $fileExtensions -ConfigAttribute @{ 'fileExtension' = '.inc'; 'allowed' = $false } -AddAt 0
Set-IISConfigAttributeValue -ConfigElement $fileExtensions -AttributeName 'applyToWebDAV' -AttributeValue $false
Stop-IISCommitDelay
using System;
using System.Text;
using Microsoft.Web.Administration;
internal static class Sample
   private static void Main()
      using (ServerManager serverManager = new ServerManager())
         Configuration config = serverManager.GetWebConfiguration("Default Web Site");
         ConfigurationSection requestFilteringSection = config.GetSection("system.webServer/security/requestFiltering");
         ConfigurationElement fileExtensionsElement = requestFilteringSection.GetChildElement("fileExtensions");
         fileExtensionsElement["applyToWebDAV"] = false;
         ConfigurationElementCollection fileExtensionsCollection = fileExtensionsElement.GetCollection();
         ConfigurationElement addElement = fileExtensionsCollection.CreateElement("add");
         addElement["fileExtension"] = @"inc";
         addElement["allowed"] = false;
         fileExtensionsCollection.Add(addElement);
         serverManager.CommitChanges();
VB.NET
Imports System
Imports System.Text
Imports Microsoft.Web.Administration
Module Sample
   Sub Main()
      Dim serverManager As ServerManager = New ServerManager
      Dim config As Configuration = serverManager.GetWebConfiguration("Default Web Site")
      Dim requestFilteringSection As ConfigurationSection = config.GetSection("system.webServer/security/requestFiltering")
      Dim fileExtensionsElement As ConfigurationElement = requestFilteringSection.GetChildElement("fileExtensions")
      fileExtensionsElement("applyToWebDAV") = False
      Dim fileExtensionsCollection As ConfigurationElementCollection = fileExtensionsElement.GetCollection
      Dim addElement As ConfigurationElement = fileExtensionsCollection.CreateElement("add")
      addElement("fileExtension") = "inc"
      addElement("allowed") = False
      fileExtensionsCollection.Add(addElement)
      serverManager.CommitChanges()
   End Sub
End Module
JavaScript
var adminManager = new ActiveXObject('Microsoft.ApplicationHost.WritableAdminManager');
adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST/Default Web Site";
var requestFilteringSection = adminManager.GetAdminSection("system.webServer/security/requestFiltering", "MACHINE/WEBROOT/APPHOST/Default Web Site");
var fileExtensionsElement = requestFilteringSection.ChildElements.Item("fileExtensions");
fileExtensionsElement.Properties.Item("applyToWebDAV").Value = false;
var fileExtensionsCollection = fileExtensionsElement.Collection;
var addElement = fileExtensionsCollection.CreateNewElement("add");
addElement.Properties.Item("fileExtension").Value = "inc";
addElement.Properties.Item("allowed").Value = false;
fileExtensionsCollection.AddElement(addElement);
adminManager.CommitChanges();
VBScript
Set adminManager = WScript.CreateObject("Microsoft.ApplicationHost.WritableAdminManager")
adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST/Default Web Site"
Set requestFilteringSection = adminManager.GetAdminSection("system.webServer/security/requestFiltering", "MACHINE/WEBROOT/APPHOST/Default Web Site")
Set fileExtensionsElement = requestFilteringSection.ChildElements.Item("fileExtensions")
fileExtensionsElement.Properties.Item("applyToWebDAV").Value = False
Set fileExtensionsCollection = fileExtensionsElement.Collection
Set addElement = fileExtensionsCollection.CreateNewElement("add")
addElement.Properties.Item("fileExtension").Value = "inc"
addElement.Properties.Item("allowed").Value = False
fileExtensionsCollection.AddElement(addElement)
adminManager.CommitChanges()