Using Custom Domains With IIS Express

When using Visual Studio 2012 with IIS Express, changing an existing binding does not work permanently. (It may work until you close VS, but after that, things get really messed up.)

The key is keeping the existing localhost binding and adding a new binding after it.

Unless you're running as administrator, you'll also need to run netsh add urlacl (to give yourself permissions to run a non-localhost site as a standard user).

If you want to allow any host name, the full process is as follows:

1. Create your web application, and find out what port it is using (see project properties, Web tab, Project Url).

2. From an administrator prompt, run the following commands (replacing portnumber with the port number you figured out in #1):

   netsh http add urlacl url="http://*:portnumber/" user=everyone
   netsh http add urlacl url="http://localhost:portnumber/" user=everyone
   

You can also use your user name (DOMAIN\USER) instead of everyone for better security.

3. Open applicationhost.config (usually under My Documents\IIS Express\config), and find the element with your port number.

4. Add one more binding with the host name you want (in this case, *). For example:

   <site name="MvcApplication1" id="2">
       <application path="/" applicationPool="Clr4IntegratedAppPool">
           <virtualDirectory path="/" physicalPath="C:\sites\MvcApplication1" />
       </application>
       <bindings>
           <binding protocol="http" bindingInformation="*:12853:localhost" />
           <binding protocol="http" bindingInformation="*:12853:*" />
       </bindings>
   </site>
   

Note that, if want to open up all host names (*), you'll need two netsh commands (one for * and one for localhost). If you only want to open up a specific host name, you don't strictly need the second netsh command (localhost); just the one with your specific host name is sufficient.

For Visual Studio 2015 the steps in the above answers apply but the applicationhost.config file is in a new location. In your "solution" folder follow the path, this is confusing if you upgraded and would have TWO versions of applicationhost.config on your machine.

\.vs\config

Within that folder you will see your applicationhost.config file

Alternatively you could just search your solution folder for the .config file and find it that way.

I personally used the following configuration:

With the following in my hosts file:

127.0.0.1       jam.net
127.0.0.1       www.jam.net

And the following in my applicationhost.config file:

<site name="JBN.Site" id="2">
    <application path="/" applicationPool="Clr4IntegratedAppPool">
        <virtualDirectory path="/" physicalPath="C:\Dev\Jam\shoppingcart\src\Web\JBN.Site" />
    </application>
    <bindings>
        <binding protocol="http" bindingInformation="*:49707:" />
            <binding protocol="http" bindingInformation="*:49707:localhost" /> 
    </bindings>
</site>

Remember to run your instance of visual studio 2015 as an administrator! If you don't want to do this every time I recomend this:

How to Run Visual Studio as Administrator by default

I hope this helps somebody, I had issues when trying to upgrade to visual studio 2015 and realized that none of my configurations were being carried over.

This is what worked for me (Updated for VS 2013, see revision history for 2010, for VS 2015 see this: https://stackoverflow.com/a/32744234/218971):

1. Right-click your Web Application Project ▶ Properties ▶ Web, then configure the Servers section as follows:

   • Select IIS Express ▼ from the drop down
   • Project Url: http://localhost
   • Override application root URL: http://dev.example.com
   • Click Create Virtual Directory (if you get an error here you may need to disable IIS 5/6/7/8, change IIS's Default Site to anything but port :80, make sure Skype isn't using port 80, etc.)

2. Optionally: Set the Start URL to http://dev.example.com

3. Open %USERPROFILE%\My Documents\IISExpress\config\applicationhost.config (Windows XP, Vista, and 7) and edit the site definition in the <sites> config block to be along the lines of the following:

   <site name="DevExample" id="997005936">
       <application path="/" applicationPool="Clr2IntegratedAppPool">
           <virtualDirectory
               path="/"
               physicalPath="C:\path\to\application\root" />
       </application>
       <bindings>
           <binding
               protocol="http"
               bindingInformation=":80:dev.example.com" />
       </bindings>
       <applicationDefaults applicationPool="Clr2IntegratedAppPool" />
   </site>
   

4. If running MVC: make sure the applicationPool is set to one of the "Integrated" options (like "Clr2IntegratedAppPool").

5. Open your hosts file and add the line 127.0.0.1 dev.example.com.

6. ► Start your application!

Some great advice from the comments:

• You may need to run Visual Studio as Administrator.
• If you want to make other devs see your IIS run netsh http add urlacl url=http://dev.example.com:80/ user=everyone
• If you want the site to resolve for all hosts set bindingInformation="*:80:". Use any port you want, 80 is just convenient. To resolve all hosts you'll need to run Visual Studio as an administrator