Routing public ip

Hello,
I have installed mikrotik 2.8.28 I go to the problem.
I have 6 IP publics to assign in the lan. how I shape router so that the Routing packages from the PC to the router passing for the mikrotik?

if I want to use Hotspot with dhcp-pool? as I manage the IP publics to assign of the sort making one configuration:

WAN: public IP
Auth: private ip (es. 192.168.0.1/24)
Client: Public IP

how I make to communicate the Auth with the client without to use the pppoe?

thanks

nobody helps me?