OpenVPN behind a NAT? Small Community Internet Provider

Emmpunkt

Sorry i don´t know how to adress my problem correctly in the subject...

OpenVPN worked correctly for a year or so, but 2 weeks ago my provider (Germany,Nümbrecht, Luzie24) changed their Provider.
In my router (Asus DSL-AC68U) i´m getting an IP like 100.112.8.xxx wich means i´m behind a NAT?!
This IP is sent to ABC.asuscomm.com.
I managed to get my Real IP (193.176.122.xxx) by ddclient on a raspberry pi and it is sent to DEF.de

So i have:
Real IP = DEF.de
NAT IP = ABC.asuscomm.com

How do i route this? In my home network it´s working, from the internet not.
A pain is, that i can´t test it from home (no mobile internet). So i have to leave my home to test everything, wich is annoying...
I read a lot, but in most cases i don´t really understand it 😃 I´m German and my english isn´t the best...
What am i looking for, what should i read?
M.

TinCanTech

If you are behind NAT (Commonly known as CG-NAT) then you no longer have a public ip address.

Maybe your ISP offers services like port forwarding or public IP address... ask them.

300000

Move to next sevice internet providers or you need to rent host vls so you can install openvpn on that host and make connections so you can use client to client connection .

Emmpunkt

300000 wrote Move to next sevice internet providers or you need to rent host vls so you can install openvpn on that host and make connections so you can use client to client connection .

I do not really have the freedom of choice. 200mbit glas or 1024kbit copper 😉

I will ask my provider, but i´m afraid the woman at the other end of the line will not even know what i´m talking about....