Good morning;

Guys, I just received my new modem from my company. My company changed the ISP to another operator. I have the new Zyxel P-870HN-51b and I am having trouble configuring the portforwarding. I did all what is in the guide but it does not seem to work, so for sure I am missing
something. Can someone help? This is important for my peers whom I am exchanging with.