I want to share, how to block W32.Kido attacks with a firewall mikrotik Kido
/ ip fi fi
add chain=forward protocol=udp src-port=135-139 action=drop comment="Block W32.Kido - Conficker" disabled=no
add chain=forward protocol=udp dst-port=135-139 action=drop comment="" disabled=no
add chain=forward protocol=udp src-port=445 action=drop comment="" disabled=no
add chain=forward protocol=udp dst-port=445 action=drop comment="" disabled=no
add chain=forward protocol=tcp src-port=135-139 action=drop comment="" disabled=no
add chain=forward protocol=tcp dst-port=135-139 action=drop comment="" disabled=no
add chain=forward protocol=tcp src-port=445 action=drop comment="" disabled=no
add chain=forward protocol=tcp dst-port=445 action=drop comment="" disabled=no
add chain=forward protocol=tcp dst-port=4691 action=drop comment="" disabled=no
add chain=forward protocol=tcp dst-port=5933 action=drop comment="" disabled=no
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