LEDE Luci Router DDNS and PORT FORWARD to Acess Server

Hello my friends!
The problem is fully RESOLVED!!
I had the exactly same problem 2016, and i get the solution from Heinz from openWRT Forum, I only forgot! Sorry guys!!

Here is the Solution and the Link´and a picture for people who falling in exact the same problem:

Solution:

@Mr.Utilman try set static IP on WAN interface:
IP 192.168.225.100
mask 255.255.255.0
gateway 192.168.225.1

dns 192.168.225.1

now open port in "Network - Firewall" Port Forwarding

THE LINK: TP LINK ARCHER SOLUTION

Screenshot-2017-10-25 LEDE - Schnittstellen - LuCI

Problem SOLVED

THANK YOU GUYS