Window Sharing in PPPOE interface

RouterOS General
1

Hi all:

I have problem to prevent window file sharing in the PPPoe interface. I’ve block 135-139 tcp/udp and 445 tcp/udp in forward chain.

My network structure is simple,RouterOS PPPoe interface and 2 PCs is connected to the same L2 switch. And i think may be this is the reason no matter what i do in the filter rules, both PCs still able to see and use file sharing.

Is there any way i can block window file sharing in this situation? (rather than uninstall in window)

Thanks!

Louis