D-Link DSL-504 User Manual page 50

DSL-504 ADSL Router User's Guide
In the second Advanced Filtering window you can supply a comment or name of
up to 15 characters for the set in the Set Comments field. Click the OK button
to save the comments, then click on the number of the subset you want to
configure to proceed to the next window.
Advanced Filtering and Firewall (Screen #3)
In the third Advanced Filtering window you will define the rule applied for the
chosen subset. Again you can supply a name for the subset in the Comment field
and click the box on the right to enable the Filter Rule.
In the Pass or Block field select the action to be performed on the IP packets,
the default is Pass Immediately. All blocked packets will be dropped.
In the Direction field choose either In or Out from the pull down menu. You can
block IP packets from coming into the network, by selecting In, blocking packets
from a specific IP address for example. Or you can block packets from a specific
IP address or subnet from leaving the LAN by selecting Out, for example, to block
Internet access for a specific host.
The Protocol field allows you to block packets based on the protocol used. You
may choose to block ICMP, TCP or UDP transmissions from the pull-down menu.
You must next specify the Source and Destination IP Addresses as well as
their Subnet Mask. This will block the packets from or destined to any specified
IP address from passing through the Router.
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