Гуру, помогите понять "how does it work"


Код: Выделить всё
/ip firewall filter
add action=accept chain=input disabled=no protocol=icmp
add action=accept chain=input connection-state=established disabled=no in-interface=smile
add action=accept chain=input connection-state=related disabled=no in-interface=smile
add action=drop chain=input disabled=no in-interface=smile
add action=jump chain=forward disabled=no in-interface=smile jump-target=customer
add action=accept chain=customer connection-state=established disabled=no
add action=accept chain=customer connection-state=related disabled=no
add action=drop chain=customer disabled=no