3Com OfficeConnect 3C16771 User Manual page 150

150 A
PPENDIX
d Set WAN/DMZ Subnet Mask to the one provided by the
ISP
e Set the NAT Public Address to one of the available IP
addresses
8 Switch on the cable modem, make sure that it is online,
and restart the Internet Firewall DMZ.
a Click Tools, and then click Restart Internet Firewall.
b When prompted to confirm this action, select Yes. The
Internet Firewall DMZ restarts.
9 When the Internet Firewall DMZ has restarted, make sure
that you can access the Internet. Enter
http://www.3Com.com/internetfirewall
can access the registration site for the Internet Firewall
DMZ.
If this does not work, see Chapter 6 for troubleshooting
information.
10 Complete the registration form, and make a note of the
registration code that you are given on completion.
11 Set up access to the server machines connected to the DMZ
ports. Run the Internet Firewall DMZ management
interface, as in step 4.
a Click Network, and then select the DMZ Addresses tab.
Make sure that the DMZ PC addresses that you use are
on the same subnet as the WAN router, and that you
enter them into the Internet Firewall DMZ in ranges.
b To enter the addresses for the first two server machines,
type
172.20.54.211
These ranges are inclusive, so this specifies the addresses
for the first two servers.
c To specify a single address for the remaining server, type
172.20.54.225
12 Re-configure all the PCs on the LAN. For each PC, repeat
steps 3a, 3b and 3c, but choose a unique IP address from
the range
E: E C
XAMPLE ONFIGURATIONS
255.255.255.0
172.20.54.217.
172.20.54.210
192.168.1.1
.
Click Update.
into the left hand box, and
into the right hand box. Click Update.
into both boxes, and click Update.
through
192.168.1.253
to see if you
.