Re: How vulnerable is the UC320 if not behind a Firewall?
The UC320 by default blocks all incoming connections. Only replies to outgoing connections are allowed. If you would like to allow incoming connections you would need to use Port Forwarding. The UC320 uses HTTPS for remote access so it is pretty secure.
If you are looking for more features with respect to Security like Anti Virus, Intrusion Detection and Prevention I would recommend the SA500.
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