W
EB
F
ILTER
I
NTRODUCTORY
S
ECTION
C
HAPTER
1: F
ILTERING
O
PERATIONS
22
M86 S
ECURITY
U
SER
G
UIDE
Router Mode
If the Web Filter is set up in the router mode, the unit will act
as an Ethernet router, filtering IP packets as they pass from
one card to another. While all original packets from client
PCs are allowed to pass, if the Web Filter determines that a
request is inappropriate, a block page is returned to the
client to replace the actual requested Web page or service.
Since only outgoing packets need to be routed—and not
return packets—the Web Filter only appears in the outgoing
path of the network.
Figure 1:1-3 illustrates an example of the router mode
setup, in which the Web Filter is set up to act as the Internet
router.
Fig. 1:1-3 Router mode diagram
As previously mentioned, a Web Filter set up in the router
mode can also work in the invisible mode. The router mode
setup also will work in the firewall mode.
