Valeu especialista! XD
TUdo certo, funcionou perfeitamente, segue abaixo pro pessoal do forum a receita de bolo!
interface bridge filter add chain=forward action=drop mac-protocol=ip dst-port=135-139 ip-protocol=tcp
interface bridge filter add chain=forward action=drop mac-protocol=ip src-port=135-139 ip-protocol=tcp
interface bridge filter add chain=forward action=drop mac-protocol=ip dst-port=135-139 ip-protocol=tcp
interface bridge filter add chain=forward action=drop mac-protocol=ip dst-port=445 ip-protocol=tcp
interface bridge filter add chain=forward action=drop mac-protocol=ip dst-port=445 ip-protocol=udp
interface bridge filter add chain=forward action=drop mac-protocol=ip dst-port=135-139 ip-protocol=udp
interface bridge filter add chain=forward action=drop mac-protocol=ip dst-port=67-68 ip-protocol=tcp
interface bridge filter add chain=forward action=drop mac-protocol=ip dst-port=67-68 ip-protocol=udp
Só copiar e colar!
Grato.