User Manual

SPEEDLAN 9000 Series Installation and Operation User Guide Version 3.03
General Functions of the Configurator 3-63
Figure 3-46: Firewall page
Note: When DHCP relay is enabled, it may appear as if DHCP requests get through
the firewall when they are not explicitly allowed. The reason for this is that DHCP
requests come in as link layer broadcasts (which are not filtered by the firewall) and
then the relay server unicasts from the SPEEDLAN 9000 router to the ultimate DHCP
server. These unicasts originate from the SPEEDLAN 9000 and thus are not considered
to be "forwarded" by the firewall. Turning off DHCP relay stops this behavior.
The elements on this page are explained below:
• Enable Firewall: Select the Enable Firewall option to activate the firewall
feature.
• Disable Firewall: Select the Disable Firewall option to disable the firewall
feature. Click Apply to activate the option you selected.
interface
source IP
internal
server
Going out
destination
IP &
netmask
& netmask