Question: Routing:

```
        context.MapRoute(
            "Dashboard_default",
            "Dashboard/{controller}/{action}/{jobName}",
            new { action = "Index", controller = "Dashboard", jobName = UrlParameter.Optional }
        );

```

But for Route

<http://localhost/candidate/Dashboard/Overview/Show/sdfdsf.xx.dd>

I recieve:

HTTP Error 404.7 - Not Found
The request filtering module is configured to deny the file extension.

In the same time, route

<http://localhost/candidate/Dashboard/Overview/Show/sdfdsf.xx>

Gives right response.

I assume some issue with IIS, have anyone seen that before?

Answer: 
To allow that particular url, in your web.config you could add this:

```
<system.webServer>
    <security>
      <requestFiltering>
        <fileExtensions>
          <remove fileExtension=".dd" />
        </fileExtensions>
      </requestFiltering>
    </security>
  </system.webServer>

```

Otherwise, you could add a `<clear />` inside of fileExtensions to allow any file to be routed.
If you're using .Net 4.0, give this a shot in your system.web section of your web.config:

```
<httpRuntime relaxedUrlToFileSystemMapping="true" />

```

More explanation here:
<http://haacked.com/archive/2010/04/29/allowing-reserved-filenames-in-URLs.aspx>

More info:
<http://weblogs.asp.net/carldacosta/archive/2010/04/24/tweaking-a-few-url-validation-settings-on-asp-net-v4-0.aspx>

As I understand it, dots are treated as a literals in the routing definition. 

<http://haacked.com/archive/2008/04/10/upcoming-changes-in-routing.aspx>