Vpn Configuration; Overview; Facts And Figures; Cha Pt Er 1 4 - 8 02. 1X - T Ech N Ic Al Guide Lin - Barracuda Networks NG Network Access Client SP4 Administrator's Manual

8.1

Overview

irtual rivate
V P
alternative to dedicated lines or dial-up RAS overcoming the security risks of internet communications.
There are two well-established technologies for data encryption: IPSec and SSL (
ayer).
L
Most VPN implementations rely solely on IPSec, which has several disadvantages in modern network
topologies. Barracuda NG VPN has incorporated both technology standards and hence improves the
VPN connectivity substantially.
Fig. 8–1 Structure of a VPN tunnel
NG
VPN client
VPN client
IP Address
=
Source
Barracuda Networks provides two types of VPN client licenses:
•
•
For detailed information concerning the different features of the two licenses, have a look at 8.2 Facts and Figures,
page 83.
8.2

Facts and Figures

•
The
Barracuda NG VPN Client
unlimited users, while on virtual appliances it is limited to the virtual appliance's capacity.

83 VPN Configuration

etworks are an efficient and cost-saving way to use the internet as a transport
N
NG
Firewall
Client IP Server Tunnel
Address IP Address
= =
Peer VPN Server
Barracuda NG VPN Client
Barracuda NG SSL VPN and NAC
VPN Licensing
license is included with every appliance. On box appliances, it allows for
VPN Configuration
HQ LAN
Destination
IP Address
=
DST
Chapter 8
ecure ocket
S S