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Virtual Private Network
A trusted network that transmits
data across an untrusted network infrastructure. For the purposes of our
discussion, the network packets that originate on a VPN are considered to
originate from within your internal perimeter network. This origin is logical
because of how VPNs are established. For communications that originate on a
VPN, security mechanisms must exist by which the firewall server can
authenticate the origin, data integrity, and other security principles
contained within the network traffic according to the same security principles
that you enforce on your trusted networks.
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