How to block conficker virus in mikrotik routers firewall rules

[ruhul@www.mikrotikroutersetup.blogspot.com] /ip firewall filter>

    add chain=forward action=drop protocol=tcp dst-port=135 comment="conficker virus block"


    add chain=forward action=drop protocol=tcp dst-port=139  comment="conficker virus block"


    add chain=forward action=drop protocol=tcp dst-port=5933 comment="conficker virus block"


    add chain=forward action=drop protocol=tcp dst-port=5933 comment="conficker virus block"


    add chain=forward action=drop protocol=udp dst-port=135 comment="conficker virus block"


    add chain=forward action=drop protocol=udp dst-port=137 comment="conficker virus block"


    add chain=forward action=drop protocol=udp dst-port=138 comment="conficker virus block"


    add chain=forward action=drop protocol=udp dst-port=445 comment="conficker virus block"


    add chain=forward action=drop protocol=tcp dst-port=445 comment="conficker virus block"

[ruhul@www.mikrotikroutersetup.blogspot.com] /ip firewall filter>