hi
i have mikrotik os server and i want to make the accessible of the clients to the internet by pppoe only

but the issue that when i configure pppoe service it seem to be work well and i can access to the internet but also without pppoe i can access to internet

how make the clients access the internet via pppoe only ???

thanks and bye

very easy, remove the ip->address from the pppoe clients input interface. the router not routes if not have address. pppoe create a "ip tunnel" by user, independtly of address of interface, is other layer.

with pppoe mikrotik recommends put the arp of interface to proxy-arp