Ps4 PPPoE can’t obtain an IP address

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Correct me if I'm wrong but:

 

1. ISP router > Netduma (PPPoE) > PS4 (PPPoE) - no internet connection

2. ISP router > Netduma (PPPoE) > PS4 (No PPPoE) - internet connection

 

and you're trying to get number 1 to work is that correct?

 

If so that will never work and is not needed. The router handles the PPPoE connection not the PS4. The only reason you need to do it without the Netduma is because there is no router to handle it. Number 2 is the correct setup, you have NAT Type 2 which is an Open NAT.