You can setup remote access to the P3 webserver by using a free dynamic DNS provider such as No-IP.

In order to access the controller's webserver, you should first go into your router's port forwarding settings and allow the ProfiLux's IP address to have access to Port 80.

You can find the exact steps to getting this setup here (See page 40):
https://www.dropbox.com/s/9i4l79svjv...Guide.pdf?dl=0