figure 6 illustrates how the internet firewall is connected to the network.
figure 6 network connection diagram
if you are installing the internet firewall 25, there is no dmz port, so you cannot connect publicly-accessible servers to it.
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 using standard 10base-t cable, make sure that the uplink/normal switch is in the uplink position.
5 turn on or restart the internet access device.
6 plug the internet firewall power supply into an ac power outlet, and then plug the power supply output cable into the power adapter socket.
7 wait for the power led to stop flashing.
the internet firewall is designed to start up as soon as
power is supplied to it. then it runs a series of self-diagnostics to check for proper operation. during these diagnostics, which take about 90 seconds, the power led flashes.
8 make sure that the link leds are on for all ports that are connected. if not, see chapter 6 for troubleshooting information.
the internet firewall is now attached to the network.
by default, no traffic that originates from the internet is allowed onto the lan, and all communications from the lan to the internet are allowed. that is, all inbound connections are blocked and all outbound connections are allowed.
you can now configure the internet firewall. see the following chapters for more information:
1 chapter 3 for a quick setup guide for the internet firewall.
2 chapter 4 for full information about all the configuration you can configure.
3 chapter 5 for information about activating and setting up the officeconnect web site filter.
at frequent intervals, check the internet firewall for the following:
1 the alert led is not continuously lit — if it is, there are problems on your network.
2 the case vents are not obstructed.
3 the cabling is secure and is not pulled taut.