71

Configuring Advanced Settings

MAC Address

If you already had Internet access through the same Internet service provider before

connecting the Gigaset SX763 WLAN dsl, it is possible that the MAC address of one of

your PCs was used for registration when the connection was being set up. In this case,

you must either replace the current MAC address with the MAC address registered with

the Internet service provider or ask your Internet service provider to register a MAC

address for you.

Carry out the following steps:

ì

Connect a PC to the Gigaset SX763 WLAN dsl and open the configuration environ-

ment.

ì

In the

Advanced Settings

menu, select:

Internet

–

Internet Connection

–

MAC Address

All settings apply for the displayed connection service that you selected for editing on

the

Advanced Settings

–

Internet

(page 64) screen. If you only set up one connection

service, this information is not displayed.

ì

Specify which MAC address is to be used for the Internet connection:

–

Use default device MAC address

: You can leave this default setting if the MAC

address of the Gigaset SX763 WLAN dsl is used for connecting to the Internet.

–

Use MAC address of this PC

: Select this option if the MAC address of the cur-

rently connected PC has previously been registered for connecting to the Internet

or if you have re-registered the MAC address of the PC on which you are currently

working.

–

Use custom MAC address

: Select this option if you have asked your Internet

service provider to register a new MAC address and this is not the MAC address of

the PC on which you are currently carrying out the configuration.

ì

Click

OK

to apply the settings.

72

Configuring Advanced Settings

Firewall

The firewall functions of the Gigaset SX763 WLAN dsl include various security functions

for the local network.

You can carry out the following:

u

Protect the network against hacker attacks (for information see below),

u

Block access by individual PCs to selected services (page 74).

The firewall functions for the Gigaset SX763 WLAN dsl are activated and configured in

the factory. If you want to deactivate the firewall, carry out the following steps:

ì

In the

Advanced Settings

menu, select:

Internet

–

Firewall

ì

Click the required option.

ì

Click

OK

to apply the settings.

73

Configuring Advanced Settings

Attack Detection

If the firewall functions of the Gigaset SX763 WLAN dsl are activated, the device moni-

tors and limits access to incoming data traffic via the DSL connection with a function

called "Stateful Packet Inspection" (SPI). This allows the Gigaset SX763 WLAN dsl to

detect and prevent certain types of attack from the Internet, such as Denial-of-Service

(DoS). DoS attacks are aimed at devices and networks with Internet connections. The

aim is not so much to steal data as to paralyse the computer or network to such an

extent that the network resources are no longer available. A typical hacker attack

involves, for example, a remote computer acting in place of the paralysed device and

receiving the data intended for the device.

You can use the

Attack Detection

function to change the standard firewall settings.

ì

In the

Advanced Settings

menu, select:

Internet

–

Firewall

–

Attack Detection

ì

Select the security level for the firewall:

–

The

Medium

default level offers high security and hardly limits functionality of

certain applications.

–

The

High

level offers maximum security and may limit functionality for certain

applications.

–

The

Low

level offers maximum functionality but may provide low security.

ì

Click

OK

to apply the settings.

74

Configuring Advanced Settings

Setting up access control to the Internet

The

Access Control

function allows you to block access to various services for one or

more PCs. You can permit or block access to services at certain times.

ì

In the

Advanced Settings

menu, select:

Internet

–

Firewall

–

Access Control

ì

Activate the

Access Control

function by selecting

On

.

You have the following setting options for

Access Control

:

Access Rules

You can limit access to the Internet for all clients, or only for certain clients in the net-

work, thereby allowing or blocking access to services.

ì

Click

Add

to create an access rule.

75

Configuring Advanced Settings

ì

Select the

Access rule type

from the list:

–

Apply to all clients

: The rule applies to all PCs in the network.

–

Specify IP address

or

Specify MAC address

: The rule applies to a PC you have

selected via the IP address or MAC address.

ì

Enter a name for the

Comment

for the access rule.

ì

Define the

Access level

.

You can choose

Deny access to the Internet

or

Allow web browsing

. If you select

Custom

, you can make the following settings:

ì

If you wish to create a

Service filter

, choose one of the following options.

–

In

Filtering mode

, specify whether the selected services are to be allowed or

blocked.

–

Select the

Services

that are to be allowed or blocked.

Select the

Protocol

and enter the appropriate

Port

(a single port number,

several port numbers separated by commas, port blocks consisting of two port

numbers separated by a dash, or any combination of these, for example

80,90-

140,180

. The

Description

that is displayed helps you to identify different serv-

ices.

–

You can also select services from the

Predefined applications

list.

–

Click

Add

to create a new entry with the entered data or for the selected, prede-

fined application.

–

Click

Delete

to delete an entry.

ì

Click

OK

to apply the settings.