Masquerade do another network with PPPoE

Hello,

I have a PPPoE server set up in a CRS125-24G. I also have a DHCP server configured, so if I plug my PC to the routerboard I have access to the routerboard, I then added that DHCP network to the NAT rules, with masquerade. What I want to do is to have access to every network on the routerboard. On the interfaces that I configure an IP address, I have access to that network behind that port normaly, the routerboard acts as a gateway as it should. The problem is on the PPPoE clientes. When they connect, a virtual interface is created, but it is added to the routes, but I don’t have access to the clientes IP addresses. How can I reach them?

(I have posted another question earlier, with a more complex question, it got deleted. I dunno why…)