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18
C
HAPTER
I
Internet Firewall Security Functions
Figure 1
Internet Firewall.
Users on the LAN have access to all resources on the
Internet that are not blocked by any of the filters. In
Figure
devices on the DMZ.
Users on the Internet can access hosts on the DMZ, such as
a Web server, but cannot access any resources on the LAN
unless they are authorized remote users.
1: I
NTRODUCTION
on the LAN are protected from hacker attacks that
might come through the WAN port.
On the OfficeConnect Internet Firewall DMZ, there is a
third port. The Demilitarized Zone (DMZ) port is used for
public servers, such as Web or FTP servers. Machines
attached to this port are visible from the WAN port, but
are still protected from hacker attacks. Users on the
secure LAN port can also access servers on the DMZ
port.
and
Figure 2
2, computers on the LAN also have full access to
illustrate security functions on the
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