DISCUS™ DRG A124G

TABLE 3

List of fields on Routing Table inside Routing section

PARAMETER

DESCRIPTION

Metric

When a router receives a routing update that contains a new or changed

destination network entry, the router adds 1 to the metric value indicated in

the update and enters the network in the routing table.

DISCUS™ DRG A124G

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Firewall Section

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Firewall Section

The Router’s firewall inspects packets at the application layer, maintains TCP

and UDP session information including time-outs and the number of active ses-

sions, and provides the ability to detect and prevent certain types of network at-

tacks.

Network attacks that deny access to a network device are called

Denial of Ser-

vice (DoS)

attacks. DoS attacks are aimed at devices and networks with a con-

nection to the Internet. Their goal is not steal information, but to disable a de-

vice or network so users no longer have access to network resources.

The router protects against the following

DoS attacks: IP Spoofing, Land Attack,

Ping of Death, IP with zero length, Smurf attack, UDP port loopback, Snork At-

tack, TCP null scan

and

TCP SYN flooding.

The firewall doesn’t significantly affect system performance, so we advise leav-

ing it enabled to protect your network.

Select

Enable

radio button and select the

SAVE SETTINGS

button to open the

firewall submenus (see

Figure 1).

FIGURE 1

Enabling Firewall screen

DISCUS™ DRG A124G

ACCESS CONTROL

menu item allows users to define the outgoing traffic per-

mitted or not-permitted through the WAN interface. The default is to permit all

outgoing traffic.

FIGURE 2

Access Control configuration on Firewall section

TABLE 1

List of fields on Access Control command menu

PARAMETER

DESCRIPTION

Enable Filtering Function

Click Yes to turn on the filtering function

Normal Filtering Table

Displays a summary of the filtering rules configured

To add a PC to the filtering table:

•

Click

Add PC

button on the Access Control screen

•

Define the appropriate settings for client PC services

•

Click

OK

button and then click

SAVE SETTINGS

button to save your set-

tings.

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DISCUS™ DRG A124G

Insertion of new access limitation on Access control

FIREWALL >> MAC FILTER

The Router can also limit the access of hosts within the local area network

(LAN).

The MAC Filtering Table

allows the Router to enter up to 32 MAC ad-

dresses that are not allowed access to the WAN port. Please note that this filter

only applies to Ethernet clients.

FIGURE 4

MAC Filter configuration on MAC Filter Table command

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