3Com OfficeConnect 3CR856-95, User Manual

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To set up One-to-One NAT:
1
Select One-to-One NAT from the NAT Mode drop-down box.
2 Enter the second address of your Internet range of addresses in
the
First IP Address in ISP Pool field.
3
Enter the first address in your LAN range of addresses to which
you want to map this range in the
First IP Address in LAN Pool
field.
3Com recommends that you set your DHCP pool to the same as
the range of LAN addresses used as your LAN pool.
4
Enter the number of addresses in the range into the Pool Size
field.
5 Click the Apply button to save your changes.
Configuring the Firewall
On the main frame of the Firewall setup screen is a menu with
four tabs: Virtual Servers , PC Privileges , Special Applications , and
Advanced . These enable you to set the access to and security of
your network.
The Virtual Servers Menu
Selecting the Firewall option on the main menu displays the
Virtual Servers screen. ( Figure 37 )
Figure 37 Virtual Servers Screen
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. 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 configure one of your computers as a DMZ host, select
Redirect Request to Virtual DMZ Host and enter the IP address of
dua08569-5aaa01.book Page 43 Wednesday, March 13, 2002 10:39 AM