32
C
HAPTER
2: I
NSTALLING
THE
H
ARDWARE
If you are installing the Internet Firewall 25, there is no
DMZ port, so you cannot connect publicly-accessible
servers to it.
CAUTION: Do not switch the Internet Firewall off and on
quickly. After switching it off, wait approximately five
seconds before switching it on again.
To attach the Internet Firewall to the network:
1
Switch off the Internet access device and disconnect it from
the LAN.
You usually switch off an Internet access device by
unplugging it from the power supply.
If you cannot switch off the device, you must restart it after
you have installed and switched on the Internet Firewall.
2
Connect the Ethernet port labeled WAN on the back of the
Internet Firewall to the Ethernet port on the Internet access
device.
Refer to the documentation for the Internet access device
to find out the configuration of its Ethernet port. If it has
an MDIX (normal) configuration, then you can use a
standard 10BASE-T cable. Otherwise, you must use a
crossover cable. See Appendix A
for more information
about the cable pinouts.
3
Connect the Ethernet port labeled LAN to the LAN.
If you are connecting the LAN port to a hub or switch using
a standard 10BASE-T cable, make sure that the
Uplink/Normal switch for the LAN port is in the Uplink
position. If you are connecting the LAN port to a hub or
switch with a crossover cable, or directly to a workstation
with standard cable, make sure the Uplink/Normal switch is
in the Normal position.
4
Connect the Ethernet port labeled DMZ to the public
servers (Internet Firewall DMZ only)
If you are installing the Internet Firewall DMZ and want to
protect the public servers, such as Web and FTP servers, use
the DMZ port. If you are connecting the DMZ port directly
to a server using standard 10BASE-T cable, make sure that
the Uplink/Normal switch is in the normal position. If you
are connecting the DMZ port to an Internet access device
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