Vista VK2-3MPBIR3V9F, User Manual

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IP Filtering
Checking the Enable IP address filtering box enables the IP address filtering function. Up to 256 IP
address entries may be specified (a single entry can contain multiple IP addresses). Click the Add
button to add new filtered addresses.
When the IP address filter is enabled, addresses added to the list are set as allowed
or denied
addresses. All other IP addresses not in this list will then be allowed or denied access accordingly, that
is, if the addresses in the list are allowed, then all others are denied access, and vice versa. See also
the online help for more information.
Note that users from IP addresses that will be allowed must also be registered with the appropriate
access rights (Guest, Operator or Administrator). This is done from Setup> System>Security>Users.

Open VPN
OpenVPN is an open source software application that implements virtual private network (VPN)
techniques for creating secure point-to-point or site-to-site connections in routed or bridged
configurations and remote access facilities.
-
OpenVPN can run over User Datagram Protocol (UDP) or Transmission Control Protocol (TCP)
transports, multiplexing created SSL tunnels on a single TCP/UDP port.
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OpenVPN uses the OpenSSL library to provide encryption of both the data and control channels.
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OpenVPN offers two types of interfaces for networking via the Universal TUN/TAP driver. It can
create either a layer-3 based IP tunnel (TUN), or a layer-2 based Ethernet TAP that can carry any
type of Ethernet traffic.