Visara SSL1000 - Manual (Page 26)

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SSL1000 User’s Manual
SSL Topology in Typical Network
The SSL Server furnishes a gateway between a local network and the Internet via an
ISP’s (Internet Service Provider’s) communications server. The SSL1000 on the LAN
is connected to the ISP by way of a modem, ISDN or router. The other link of the SSL
Server is to the network controller or mainframe. The following diagrams illustrate
three possible network configurations:
Trust Everyone Behind the Firewall
Everyone behind the firewall can reach the data center. There is no need for encryption
except when coming through the firewall from the outside. There is a direct or routed
path to the data center LAN, and a hole in the Firewall to reach the SSL1000. With this
topology, the Data Center PCs can have Internet access.
Data Center PCs
coax
coax
Main
Frame
#1
Main
Frame
#2
Main
Frame
#3
ESCON
Director
Visara
SCON
Visara
SCON
1883
1883
PC PC PC
SSL
1000
Data Center Corporate IT DMZ
PC
PC
PC
PC
F
I
R
E
W
A
L
L
Offices
R
O
U
T
E
R
Server
Server
Server