49
Creating a Virtual DMZ
A virtual DMZ (De-Militarized Zone) Host is a computer on your
network with reduced protection provided by the firewall. This
feature allows a single computer to be exposed to 2-way
communication from outside of your network in One-to-Many
NAT mode. The PC is still protected against DoS and hacker
attacks.
CAUTION:
This feature should be used only if the Virtual Server
or Special Applications options do not provide the level of access
needed for certain applications.
To specify one of your computers as a DMZ host, select
Redirect
Request to Virtual DMZ Host
and enter the IP address of the
computer in the
IP Address of DMZ Host
text box, and then click
SAVE
.
Creating a Virtual Server
Activating and configuring a virtual server allows one or more of
the computers on your network to function as an Internet service
host. For example, one of your computers could be configured as
an FTP host, allowing others outside of your office network to
download files of your choosing. Or, if you have created a Web
site, you can configure one of your computers as a Web server,
so that others can view your Web site.
If you are using One-to-Many NAT you can only have one server
of each type on your network. To have more than one server of
a type (for example more than one web server) visible to the
Internet you must be using One-to-One NAT.
To configure a virtual server:
1
Click
New
on the right side of the
Virtual Servers
screen to open
the
Virtual Server Settings
dialogue box. (
Figure 45
).
2
Enter the IP address of the computer in the
Server IP Address
text
box.
3
Select the Service from the pull-down list.
Figure 45
Virtual Servers Settings Screen
If you select
Custom,
the screen shown in
Figure 46
displays.
Specify a suitable name for the service and then enter the port
numbers required for that service. If a service requires more than
one port number enter the multiple ports as a comma separated
list or a range e.g. 51,52,54-59.
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