
Firewall Zones
LAN
DMZ
WAN
N
R
F
G
G
S
S
C
SLB
W
STOP
DoS Attacks Blocked
Web Access Allowed
Unauthorised External Access Blocked
Authorised External Access using VPN (Encrypted)
STOP
STOP
STOP
Internet Access Filtered (optional)
W
N
R
Key:
W
N
eb and
etwork
Servers
Client PC
SLB
S
C
G
F
SuperStack 3
irewall
F
100/1000
Mbps
igabit Switch
G
10/100 Mbps
witch with
Gigabit port
S
R
outer
S
L
B
erver
oad
alancer
Web ache
c
C
DQA1611-0AAA01.fm Page 3 Thursday, August 2, 2001 4:15 PM