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Introduction
VSU-2000 User Guide
The VSU-2000 supports a full suite of VPN services including: ICSA-certified
IPSec-based encryption, data compression, packet and user authentication, IKE
and SKIP key management, Network Address Translation (NAT), routing, and a
network firewall (packet filtering).
Security
The VSU-2000 provides data stream privacy by employing cryptographic
algorithms and keys powerful enough for the most sensitive business
communications. The VSU-2000 supports 56-bit DES and 168-bit 3DES
encryption, as well as the ISAKMP and SKIP key management standards.
Data authenticity is assured by using MD5
™
or SHA-1 hashing algorithms to
reject altered or forged packets. All security mechanisms employed by the
VSU-2000 conform to Internet Engineering Task Force RFCs, in order to
provide interoperability and broaden the use of VPN technology.
Performance
The VSU-2000 supports IP over 10BASE-T or 100BASE-T local area networks
(LANs). When packets are encrypted and authenticated according to IPSec
protocol guidelines, additional bytes—in the form of IPSec headers—must be
added to packets. In many cases, the additional packet overhead imposes a
performance penalty in return for security. The extra bytes tend to lengthen
packets and reduce the throughput (measured in packets per second). Of even
greater impact is the tendency for packets lengthened by IPSec headers to be
fragmented by network routers, causing further reductions in performance and
additional latency. Real-time compression performed by the VSU-2000
eliminates packet fragmentation and produces fewer, smaller packets, which can
significantly enhance network throughput and performance.
Plug-and-Play Installation
The VSU-2000 can be placed anywhere in a 10/100BASE-T LAN to provide
VPN functionality. Native support for IP ensures that the VSU-2000
interoperates transparently with the broadest range of intranet and other network
applications.
The graphical VPNmanager™ (available separately) network management
application steps network managers through the setup process and allows them to
configure a VPN in minutes. The VPNmanager also supports extensive facilities
for VPN monitoring and troubleshooting, and for establishing multi-company
Summary of Contents for VSU 2000
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