D-Link DSL-500, Руководство пользователя

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DSL-500 ADSL Router User’s Guide
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Static Route Configuration – Modify/Add
Static Route Configuration Menu
To add or modify a static route, define the following parameters:
Name Provide a name for the static route or subnet (optional).
IP Address Type in the IP address of the subnet or device where packets are routed.
Subnet Mask Type in an appropriate subnet mask that allows the static route to function.
Gateway Type in the IP address of the gateway used for traffic destined for the specified subnet
or device.
Metric Type in the maximum number of hops allowed for the static route.
State Enable of disable the route using the drop-down menu.
Click on OK to put the static route into the table. It will appear in the Static Route Table shown previously.
To clear the settings for this configuration, click the Clear button.
To return to the Static Route Table, click the Exit icon.
Advanced Filter & Firewall
One of the most important elements of any network security implementation is the firewall. Packet filtering is a
basic firewall security measure and should be used on any network that is exposed to security risk. A packet
filter system examines data packets and scrutinizes them in order to control network access. Filtering rules
determine whether packets are passed through the Router from either side of the gateway. The rules are created
and controlled by the network administrator and can be precisely defined. These rules are used to block access to
the LAN from outside the network and/or to deny access to the WAN from within the network. The Router uses
filtering rules to examine data packet headers for specific information. Packets passing through the Router that
do not meet the criteria specified by the rule set are dropped.
In order to improve network security without severely limiting network efficiency, it is important to carefully
plan the sets of access rules. Effective implementation of packet filtering requires detailed knowledge of network
services and communication protocols. An overly complicated filtering scheme can adversely effect routing
performance, while an inadequate set of rules may needlessly compromise security.