SBG5500 / L2TP Server Role / Client Connect / Internet Fails

Hi All - I have the challenge to get the internet connection work, while the user is connected to the SBG5500 via L2TP VPN. The access to local resources work well, but the internet connection via IP or resolved (DNS) IP, does not work.

It seems somewhere on the firewall the packages get dropped.

Any idea how to get the internet request channelled through the firewall?

Thanks, Simon