In order to setup IIS Express for remote access over LAN I followed the instructions here:

Then I figured out that I had to use the group “alla” since my OS locale was Swedish:

Since I use Visual Studio I had to use iisexpress-proxy as a last step:

Here is an example:

iisexpress-proxy 64764 to 81.

This is also how I managed to get Umbraco running in development, staging and production separated environments due to Umbraco Courier 2 not being very well designed.