HY-LINE truecon Router Handbuch Seite 36
HY-LINE Systems GmbH
Inselkammerstr. 10 82008 Unterhaching systems(at)hy-line.de www.hy-line.de/systems
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Virtual Private Network
(
VPN
) is a computer network that communicates private data through a big
open network such as the internet. Members of the VPN that are logged in can exchange data as if they
were part of a private LAN. The meaning private implies that the connection is established much like a
local LAN but does not imply that the connection is encrypted. A tunnel is established between Client
and Server, this connection is the tunnel but VPN tunnels do not have to be encrypted.
Secure VPNs
use cryptographic tunneling protocols to provide the intended confidentiality (blocking
snooping and thus Packet sniffing), sender authentication (blocking identity spoofing), and message
integrity (blocking message alteration) to achieve privacy. When properly chosen, implemented, and
used, such techniques can provide secure communications over unsecured networks. This has been the
usually intended purpose for VPN for some years.
Because such choice, implementation, and use are
not
trivial, there are many insecure VPN schemes
available on the market.
Secure VPN technologies may also be used to enhance security as a "security overlay" within dedicated
networking infrastructures.
Secure VPN protocols includud in the M2M Router are following:
IPsec (IP security) - commonly used over IPv4, and an obligatory part of IPv6.
PPTP (point-to-point tunneling protocol), developed jointly by a number of companies, including
Microsoft.
