How do I grant anonymous access to a url using FormsAuthentication?

For the most part, my webapp requires authentication to do anything. There are a few pages, namely the homepage, that I'd like people to be able to access without authenticating.

Specifically, I'd like to allow anonymous access to these urls:

/home 
/default.aspx

I'm using asp.net MVC and FormsAuthentication. Both urls point to the same view:

/home/index.aspx

Here is my current configuration in web.config.

<authentication mode="Forms">
  <forms loginUrl="~/Account/LogOn" timeout="2880" />      
</authentication>
<authorization>           
  <deny users="?" />      
</authorization>

Reading the documentation for the authorization tag, it says "Configures the authorization for a Web application, controlling client access to URL resources." It seems like I should be able to use the authorization tag to specify a url and allow access.

Something like:

<authentication mode="Forms">
  <forms loginUrl="~/Account/LogOn" timeout="2880" />      
</authentication>

<authorization>           
  <deny users="?" />      
</authorization>

<authorization url="/default.aspx">           
  <allow users="?" />      
</authorization>

<authorization url="/home">           
  <allow users="?" />      
</authorization>