Wireless Broadband Router User Manual
36
4.6 Filters
When your Wireless Broadband Router operates as a router, the
built-in NAT function provides your LAN with the Internet access
via the single public IP of the WAN port. That means all network
devices are allowed to access various Internet service. Under this
circumstance, network security becomes an important issue and
system administrators may need to build access control to protect
the network.
The filter feature serves as a basic firewall security measure for
your network. When filter function is enabled, the Wireless
Broadband Router inspects all data packets arrive from LAN side
and determines if packets are allowed to pass through the WAN
port depending on whether packets match your filter rules and
whether your filter type is
Listed Pass or Listed Block.
In addition to filter settings, the Filters page also allows to configure
other firewall settings, including WAN Management, WAN Port
Ping Reply and Report Log to TFTP Server.
Specifing Your IP Filter Rules
If you are going to specify your filter rules, follow the procedures
below:
1. In
the
Firewall
item, select the
Enable
option.
2. In
the
Filter Type
item, select the action (
Listed Pass
or
Listed Block
) to be performed on the IP packets matching
your filter rules.
3. In the four filter types, select whether to enable or disable each
filter.
4. If a filter is enabled, enter the criteria in provided fields. Click
More
to add more criteria if required. See next section for
more information.
5. Click
Apply
to commit your changes.
