Routing between 2 subnets with pppoe

Hi, I’ve been searching for an answer but I didn’t found anything.

I have some subnets, one of them is a 192.168.0.0/24 on ether1, I have a vlan with a pppoe server and my clients are operating on the range 172.16.6.0/24. The router on the client’s house has a webfig page and it should be accesed via wan port, so I can’t reach it from 192.168.0.0/24. If I configure a pc on that vlan and with a pppoe client, with an ip on the same range of the clients, I can reach the router’s client without any problem

can anybody tell me how I can solve this?

nobody?

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