title: Redirect to non-www-url domain with ASP.NET?
body: <p>This is not a duplicate post. I've looked through similar questions on SO but didn't find the solution to my problem.</p>
  
  <p>As someone has already suggested I should do the following to redirect www-url to non-www url (or vice versa):</p>
  
  <p><strong>Here’s the IIS7 rule to remove the WWW prefix from all incoming URLs. Cut and paste this XML fragment into your web.config file under</strong></p>
  
  <pre><code>&lt;system.webServer&gt; / &lt;rewrite&gt; / &lt;rules&gt;
  
  &lt;rule name="Remove WWW prefix" &gt;
  &lt;match url="(.*)" ignoreCase="true" /&gt;
  &lt;conditions&gt;
  &lt;add input="{HTTP_HOST}" pattern="^www\.domain\.com" /&gt;
  &lt;/conditions&gt;
  &lt;action type="Redirect" url="http://domain.com/{R:1}"
      redirectType="Permanent" /&gt;
  &lt;/rule&gt;
  </code></pre>
  
  <p>But the problem is when I add that block of code under <code>&lt;system.webServer&gt;</code> I get a syntax error with blue underline saying: "<strong>The &lt; system.webServer > has an invalid child element &lt; rule >...</strong>".</p>
  
  <p>Of course I've replaced domain.com with my domain. I have also tried putting that block of code outside <code>&lt;system.webServer&gt;</code> but still inside <code>&lt;configuration&gt;</code> of web.config file, which resulted in <strong>Internal server error 500</strong>.</p>
  
  <p>If this helps: My hosting provider is GoDaddy (Shared Hosting). ASP.NET MVC on .NET Framework 3.5</p>
  
  <p>And here's my entire web.config file:</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  
  &lt;!-- 
      Note: As an alternative to hand editing this file you can use the 
      web admin tool to configure settings for your application. Use
      the Website-&gt;Asp.Net Configuration option in Visual Studio.
      A full list of settings and comments can be found in 
      machine.config.comments usually located in 
      \Windows\Microsoft.Net\Framework\v2.x\Config 
  --&gt;
  &lt;configuration&gt;
  
    &lt;configSections&gt;
      &lt;sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"&gt;
        &lt;sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"&gt;
          &lt;section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/&gt;
          &lt;sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"&gt;
            &lt;section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" /&gt;
            &lt;section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /&gt;
            &lt;section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /&gt;
            &lt;section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" /&gt;
          &lt;/sectionGroup&gt;
        &lt;/sectionGroup&gt;
      &lt;/sectionGroup&gt;
    &lt;/configSections&gt;
  
    &lt;appSettings/&gt;
  
    &lt;connectionStrings&gt;
      &lt;add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/&gt;
    &lt;/connectionStrings&gt;
  
    &lt;system.web&gt;
  
      &lt;!-- 
              Set compilation debug="true" to insert debugging 
              symbols into the compiled page. Because this 
              affects performance, set this value to true only 
              during development.
      --&gt;
      &lt;compilation debug="true"&gt;
        &lt;assemblies&gt;
          &lt;add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/&gt;
          &lt;add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
          &lt;add assembly="System.Web.Abstractions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
          &lt;add assembly="System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
          &lt;add assembly="System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
          &lt;add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/&gt;
          &lt;add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/&gt;
          &lt;add assembly="System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /&gt;
        &lt;/assemblies&gt;
      &lt;/compilation&gt;
  
      &lt;!--
              The &lt;authentication&gt; section enables configuration 
              of the security authentication mode used by 
              ASP.NET to identify an incoming user. 
      --&gt;
      &lt;authentication mode="Forms"&gt;
        &lt;forms loginUrl="~/Account/LogOn" timeout="2880" /&gt;
      &lt;/authentication&gt;
  
      &lt;membership&gt;
        &lt;providers&gt;
          &lt;clear/&gt;
          &lt;add name="AspNetSqlMembershipProvider"
               type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
               connectionStringName="ApplicationServices"
               enablePasswordRetrieval="false"
               enablePasswordReset="true"
               requiresQuestionAndAnswer="false"
               requiresUniqueEmail="false"
               passwordFormat="Hashed"
               maxInvalidPasswordAttempts="5"
               minRequiredPasswordLength="6"
               minRequiredNonalphanumericCharacters="0"
               passwordAttemptWindow="10"
               passwordStrengthRegularExpression=""
               applicationName="/"
                  /&gt;
        &lt;/providers&gt;
      &lt;/membership&gt;
  
      &lt;profile&gt;
        &lt;providers&gt;
          &lt;clear/&gt;
          &lt;add name="AspNetSqlProfileProvider"
               type="System.Web.Profile.SqlProfileProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
               connectionStringName="ApplicationServices"
               applicationName="/"
                  /&gt;
        &lt;/providers&gt;
      &lt;/profile&gt;
  
      &lt;roleManager enabled="false"&gt;
        &lt;providers&gt;
          &lt;clear /&gt;
          &lt;add connectionStringName="ApplicationServices" applicationName="/" name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /&gt;
          &lt;add applicationName="/" name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /&gt;
        &lt;/providers&gt;
      &lt;/roleManager&gt;
  
      &lt;!--
              The &lt;customErrors&gt; section enables configuration 
              of what to do if/when an unhandled error occurs 
              during the execution of a request. Specifically, 
              it enables developers to configure html error pages 
              to be displayed in place of a error stack trace.
  
          &lt;customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"&gt;
              &lt;error statusCode="403" redirect="NoAccess.htm" /&gt;
              &lt;error statusCode="404" redirect="FileNotFound.htm" /&gt;
          &lt;/customErrors&gt;
      --&gt;
  
      &lt;pages&gt;
        &lt;controls&gt;
          &lt;add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
          &lt;add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
        &lt;/controls&gt;
  
        &lt;namespaces&gt;
          &lt;add namespace="System.Web.Mvc"/&gt;
          &lt;add namespace="System.Web.Mvc.Ajax"/&gt;
          &lt;add namespace="System.Web.Mvc.Html"/&gt;
          &lt;add namespace="System.Web.Routing"/&gt;
          &lt;add namespace="System.Linq"/&gt;
          &lt;add namespace="System.Collections.Generic"/&gt;
        &lt;/namespaces&gt;
      &lt;/pages&gt;
  
      &lt;httpHandlers&gt;
        &lt;remove verb="*" path="*.asmx"/&gt;
        &lt;add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
        &lt;add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
        &lt;add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/&gt;
      &lt;/httpHandlers&gt;
  
      &lt;httpModules&gt;
        &lt;add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
        &lt;add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
      &lt;/httpModules&gt;
  
    &lt;/system.web&gt;
  
    &lt;system.codedom&gt;
      &lt;compilers&gt;
        &lt;compiler language="c#;cs;csharp" extension=".cs" warningLevel="4"
                  type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"&gt;
          &lt;providerOption name="CompilerVersion" value="v3.5"/&gt;
          &lt;providerOption name="WarnAsError" value="false"/&gt;
        &lt;/compiler&gt;
  
        &lt;compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" warningLevel="4"
                  type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"&gt;
          &lt;providerOption name="CompilerVersion" value="v3.5"/&gt;
          &lt;providerOption name="OptionInfer" value="true"/&gt;
          &lt;providerOption name="WarnAsError" value="false"/&gt;
        &lt;/compiler&gt;
      &lt;/compilers&gt;
    &lt;/system.codedom&gt;
  
    &lt;system.web.extensions/&gt;
  
    &lt;!-- 
          The system.webServer section is required for running ASP.NET AJAX under Internet
          Information Services 7.0.  It is not necessary for previous version of IIS.
    --&gt;
    &lt;system.webServer&gt;
  
      &lt;validation validateIntegratedModeConfiguration="false"/&gt;
  
      &lt;modules runAllManagedModulesForAllRequests="true"&gt;
        &lt;remove name="ScriptModule" /&gt;
        &lt;remove name="UrlRoutingModule" /&gt;
        &lt;add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
        &lt;add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
      &lt;/modules&gt;
  
      &lt;handlers&gt;
        &lt;remove name="WebServiceHandlerFactory-Integrated"/&gt;
        &lt;remove name="ScriptHandlerFactory" /&gt;
        &lt;remove name="ScriptHandlerFactoryAppServices" /&gt;
        &lt;remove name="ScriptResource" /&gt;
        &lt;remove name="UrlRoutingHandler" /&gt;
        &lt;add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode"
             type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
        &lt;add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode"
             type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt;
        &lt;add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
        &lt;add name="UrlRoutingHandler" preCondition="integratedMode" verb="*" path="UrlRouting.axd" type="System.Web.HttpForbiddenHandler, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /&gt;
      &lt;/handlers&gt;
    &lt;/system.webServer&gt;
  
    &lt;runtime&gt;
      &lt;assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"&gt;
        &lt;dependentAssembly&gt;
          &lt;assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35"/&gt;
          &lt;bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0"/&gt;
        &lt;/dependentAssembly&gt;
      &lt;/assemblyBinding&gt;
    &lt;/runtime&gt;
  
  &lt;/configuration&gt;
  </code></pre>