ZyXEL Communications VPN Series Handbook page 582

Test the result
After you enabled Anti-Malware function and your PC downloaded
the virus file from internet. You device will detected it and drop the
file directly.
Then your file is unable opened or replaced by "0".
Additional configuration
White List: You can use wildcard to allowing specific type files.
Black List: You can use wildcard to drop specific type files.
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