My version:
} ; :log warning "Imported address list < $blacklist> from file: $url"
} else={:log warning "Address list: <$blacklist>, downloaded file to big: $url" }
} on-error={:log warning "Address list <$blacklist> update failed"}
Collecting ranges of IP addresses that are knocking at the door: http://forum.mikrotik.com/t/feature-request-blocking-a-special-kind-of-ddos/133917/15