DryTek Vigor 2952 series, Руководство пользователя

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Vigor2952 Series User’s Guide 233
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A Virtual Private Network (VPN) is the extension of a
private network that encompasses links across shared
or public networks like the Internet. In short, by VPN
technology, you can send data between two computers
across a shared or public network in a manner that
emulates the properties of a point-to-point private
link.
It is a form of VPN that can be used with a standard
Web browser.
A digital certificate works as an electronic ID, which is
issued by a certification authority (CA). It contains
information such as your name, a serial number,
expiration dates etc., and the digital signature of the
certificate-issuing authority so that a recipient can
verify that the certificate is real. Here Vigor router
support digital certificates conforming to standard
X.509.