D-Link DI-308 - Manual (Page 56)

DI-308 ISDN Remote Router
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The three submenus are described as follows:
•
Filter State of Interface – This is used to choose the default, routing decisions
for packets, not meeting the criteria for specific filters.
•
Layer 2 Filter – This is a data-link layer (protocol independent) filter.
Foreknowledge of the specific protocol, used on the interface (LAN or WANs), is
needed to make effective use of this filter.
•
IP Filter – This is an IP protocol specific filter, allowing you to, among other
things, prohibit specific packets from entering the LAN. Alternatively, you can
set up filters that allow certain types of IP packets to enter the LAN.
Filter State of Interface
The Filter State of Interface submenu lets you toggle default, routing decisions, if
the packets are not subjected to a filter, routing decision. In other words, a packet,
having not met the criteria for a specific filter that was applied to a specific interface,
will be subjected to this default, routing decision.