How do you set up a default route to an area?

I have a folder called areas, 开发者_高级运维in it I have 2 folders (Admin and Portal). How would I need to set up my Default route so when I start the site at the root site it routes it to Portal/Home/Index action?

I suppose THIS is what You are looking for.

And this is how it looks =>

But there might be better approach. This is more like hack.