rules per interface. If all six rules in an index are Next rules, the data will be sent to the next

index for filtering.

Filter Type:

You can select

IP/MAC Filter

,

Application

, and

URL Filter

type.

IP/MAC Filter Set Index:

The IP/MAC Filter Set Index from 1 to 12 and each index can set up

to 6 IP Filter.

Interface:

Choices from

PVC0

to

PVC7

and

LAN

.

60

Direction:

Choices are

Both

,

Incoming

and

Outgoing

. Select which direction of data flow

you wish to apply the filters to.

Note

that

Incoming and Outgoing

are from the point of view of

your router, relative to the interface you select.

For WAN

, data coming from outside your

system is considered Incoming and data leaving your system is Outgoing.

For LAN

, data

leaving your system is considered Incoming and data entering your system is Outgoing.

IP/MAC Filter rule Index:

The IP/MAC Filter rule Index from 1 to 6.

IP/MAC Filter Rule Editing:

Select the IP/MAC Filter Rule Index you wish to modify.

Active:

Toggle this rule index on or off with Yes or No, respectively.

Source IP Address:

Enter the source IP address you wish to deny access to your system.

Subnet Mask:

Enter the subnet mask of the source IP address.

Port Number:

Enter the port number of the source IP address. Note that 0 means all that ports

are allowed.

Destination IP Address:

Enter the destination IP address that you wish to deny access to

your system.

Subnet Mask:

Enter the subnet mask of the destination IP address

Port Number:

Enter the port number of the destination IP address. Note that 0 means that all

ports are allowed

Protocol:

Select the protocol to filter. Choices are TCP, UDP, and ICMP.

Rule Unmatched:

Choices are

Forward

and

Next.

Select what happens to the data in

question if the rule you are currently editing is unmatched. Next means that the data is then

compared to the next IP filter rule. Forward means that the data will be allowed into your

system. Note that a Forward rule should be the last rule, as no data will be compared to rules

after a Forward rule.

IP/MAC Filter Set Index:

Select the IP/MAC filter set you wish to view.

61

For Example

Please follow below steps to set your IP Filter:

1.

IP Filter Set Editing

:

Choose your

IP Filter Set Index

, Interface and Direction options.

Remember, Interface and Direction functions are affected with IP Filter Set Index

. EX: if

your 1

st

index set of IP filter set PVC0 as Interface and Outgoing as Direction, so the list of

1

st

IP Filter will be PVC0 and Outgoing as their settings.

2.

IP Filter Rule Editing:

Select the

IP Filter Rule Index

(up to 6 numbers for each set index)

and choose

Active

option.

As below example,

Source IP Address

is 192.168.1.4,

Subnet Mask

is 255.255.255.255,

Destination IP Address

&

Subnet Mask

is 0.0.0.0,

Port Number

is 80. And,

Protocol

sets TCP. From this setting, it filters 192.168.1.14, so it

cannot access the web.

Notice

, each IP Filter Set Index can has up to 6 filters IP. At “

Rule

Unmatched

” option, you must choose

NEXT

until the last filter IP choose

Forward

.

3.

After every setting is done, click

SAVE

to continue next IP Filter Editing.

62

4.5.3

SNMP

The

Simple Network Management Protocol (SNMP)

is used for exchanging information

between network devices. It enables a host computer to access configuration, performance,

and other system data that resides in a database on the modem. The host computer is called a

management station

and the modem is called an

SNMP agent

. The data that can be accessed

via SNMP is stored in a

Management Information Database

(MIB) on the modem.

Get Community:

Select to set the password for incoming Get- and GetNext request from

management station.

Set Community:

Select to set the password for incoming Set request from management

station.

4.5.4

UPnP

UPnP (Universal Plug and Play)

is a distributed, open networking standard that uses

TCP/IP for simple peer-to-peer network connectivity between devices. An UPnP device can

dynamically join a network, obtain an IP address, convey its capabilities and learn about other

devices on the network. In turn, a device can leave a network smoothly an automatically when

it is no longer in use. UPnP broadcasts are only allowed on the LAN.

UPnP (Universal Plug and Play):

You can choose

“Activated”

or

“Deactivated”

option from

this session.

63

Auto-Configured (by UPnP Application):

UPnP network devices can automatically

configure network addressing, announce their presence in the network to other UPnP devices

and enable exchange of simple product and service descriptions. Choose

“Activated”

option

to allow UPnP-enabled applications to automatically configure the ADSL Router so that they

can communicate through the ADSL Router, for example by using NAT traversal, UPnP

applications automatically reserve a NAT forwarding port in order to communicate with another

UPnP enabled device; this eliminates the need to manually configure port forwarding for the

UPP enabled application.

If you don’t want to make configuration changes through UPnP,

just choose

“Deactivated”

.

SAVE

: Click

SAVE

to save the setting to the ADSL Router.

4.5.5

DDNS

64

The

Dynamic Domain Name System

allows you to update your current dynamic IP address

with one or many dynamic DNS services so that anyone can contact you (in NetMeeting,

CU-SeeMe, etc.). You can also access your FTP server or Web site on your own computer

using a DNS-like address (for instance myhost.dhs.org, where my host is a name of your

choice) that will never change instead of using an IP address that changes each time you

reconnect. Your friends or relatives will always be able to call you even if they don't know your

IP address. First of all, you need to have registered a dynamic DNS account with

www.dyndns.org. This is for people with a dynamic IP from their ISP or DHCP server that

would still like to have a DNS name. The Dynamic DNS service provider will give you a

password or key.