51

Configuring the Advanced Settings

Global time limit

ì

Activate or deactivate the time limit available to all users in your network for surfing

the Internet each month. This makes sense if your Internet tariff is time-based.

ì

Enter the total amount of time available per month in hours.

Global volume limit

ì

Activate or deactivate the limit on the data volume available to all users in your net-

work for surfing the Internet (download and upload) each month. This makes sense

if your Internet tariff is volume-based.

ì

Enter the total volume of data available per month in megabytes (MB).

Individual limits

You can specify individual limits for data volumes for individual PCs within your net-

work.

ì

Select or deselect

Individual limits

.

ì

Enter the MAC address of the PC and a device name for identification.

ì

In the

Volume limit

field, enter the data volume available per month in megabytes

(MB). A standard volume limit is used for all non-listed clients.

ì

Click on

Delete

to delete an entry.

ì

Click on

Add

to create a new entry with the entered data or for the selected PC.

ì

Click on

OK

to save and apply the changes.

You can check at any time how much time and volume is still available this month in the

Status

–

Traffic Control

menu (see page 105) and on the login screen for the configu-

ration program under

Traffic Control

(see page 24).

Please remember:

The values recorded by your device for online time and transmitted data volume are

only intended for your guidance and may differ from the exact values determined by

your Internet provider.

52

Configuring the Advanced Settings

Firewall

The firewall functions of the Gigaset SE551 WLAN dsl/cable include various security

functions for your local network.

You can:

u

protect your network against hacker attacks (see below),

u

block individual PCs' access to selected services or Internet sites (see page 56) or

restrict them by means of a schedule rule (see page 59).

The firewall functions for Gigaset SE551 WLAN dsl/cable are activated and configured in

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

ì

In the

Advanced Settings

–

Internet

menu, select

Firewall

.

ì

Select the required option.

ì

Click

OK

to apply the settings.

53

Configuring the Advanced Settings

Attack detection

If the firewall functions of your Gigaset SE551 WLAN dsl/cable are activated, the device

monitors and limits the access of incoming traffic via the DSL connection with a func-

tion called Stateful Packet Inspection (SPI). This allows the Gigaset SE551 WLAN dsl/

cable to identify 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 connec-

tions. The aim is not so much to steal data but to paralyse the computer or network to

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

attack involves making a remote computer announce that it is acting for the paralysed

device, for example, and receive the data meant for it.

You can use the Attack Detection function to change the standard firewall settings and

arrange to be notified by email about any attempted hacker attacks.

ì

In the

Advanced Settings

–

Internet

–

Firewall

menu, select

Attack Detection

.

ì

Select the security level for the firewall.

The default setting is

Medium

, which combines a high degree of security with little

effect on functionality.

–

The level

High

offers you maximum security with possibly limited functionality

for special applications.

–

The level

Low

offers you maximum functionality with possibly reduced security.

54

Configuring the Advanced Settings

–

Select

Custom

to determine the criteria for defence against hacker attacks your-

self. Further setting options are then shown in the window.

E-mail notification of a hacker attack

You can choose to be informed by e-mail about a possible hacker attack.

ì

Enter the following in the dialogue fields:

–

Select the

Notification interval

, i.e. at what intervals you wish to be informed

about hacker attacks. If hacker attacks have been identified and blocked in the

intervening period, you will receive a summary about each event.

–

E-mail address to notify

: Enter the e-mail address to which the notifications are

to be sent.

–

Outgoing mail server (SMTP)

: Enter the address of the outgoing mail server

through which your device can send you the notifications.

–

Incoming mail server (POP3)

: If your outgoing mail server demands authentica-

tion via POP3 before e-mails can be sent, enter the address of the outgoing mail

server here.

–

Enter your

User name

and the relevant

Password

.

ì

Click on

Test Settings

to check the details for the e-mail notification.

55

Configuring the Advanced Settings

User-defined settings

u

Stateful Packet Inspection

Your device monitors and limits the access of incoming traffic from the Internet with

SPI (Stateful Packet Inspection). This allows it to identify and block certain types of

attack such as Denial-of-Service (DoS). A typical DoS attack involves a remote com-

puter paralysing a system and announcing that it is acting for the paralysed device

in order to receive the data meant for it. For the level

Custom

you can specify your-

self whether you wish to activate SPI on your device and which exceptions you wish

to make.

ì

Activate or deactivate

Stateful Packet Inspection

for your device's Internet connec-

tion.

ì

Select the services for which you also wish to allow incoming

Traffic

if it has been

initiated by a client in your LAN. If you select the

All

option at the end of the list you

can allow all services.

ì

Click

OK

to apply the settings.