Amer-networks E5Web GUI Bedienungsanleitung PDF herunterladen (Seite 566)

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2. Client to LAN connection - Where many remote clients need to connect to an internal

network over the Internet. In this case, the internal network is protected by the Clavister

Security Gateway to which the client connects and the VPN tunnel is set up between them.

9.1.2. VPN Encryption

Encryption of VPN traffic is done using the science of cryptography. Cryptography is an umbrella

expression covering 3 techniques and benefits:

Confidentiality No one but the intended recipients is able to receive and

understand the communication. Confidentiality is

accomplished by encryption.

Authentication and Integrity Proof for the recipient that the communication was actually

sent by the expected sender, and that the data has not

been modified in transit. This is accomplished by

authentication, and is often implemented through the use

of cryptographic keyed hashing.

Non-repudiation Proof that the sender actually sent the data; the sender

cannot later deny having sent it. Non-repudiation is usually

a side-effect of authentication.

VPNs are normally only concerned with confidentiality and authentication. Non-repudiation is

Chapter 9: VPN

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