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36
Security settings
SSID
Before the wireless network components can communicate with each other, you must
use the same
SSID
(Service Set Identifier).
The default SSID for the Gigaset SE551 WLAN dsl/cable is
ConnectionPoint
. For security
reasons you should change this SSID and deactivate SSID broadcast.
If this option is enabled, the Gigaset SE551 WLAN dsl/cable will send the SSID in all data
transmissions, and your Gigaset SE551 WLAN dsl/cable's SSID will be displayed on PCs
that have a wireless network adapter. In this case unauthorised persons could use the
SSID to gain access to your network.
ì
Enter a character string of your choice in the
SSID
field. The SSID is case sensitive.
It can be up to 32 alphanumerical characters long.
Make a note of the SSID. You will need this to register your PC.
By default
SSID broadcast
is inactive. For security reasons you should not change this
preconfiguration.
ì
Click on
Next >
to proceed to the next step.
Please remember:
The connection to the wireless network adapters will be broken until the new SSID
has been entered in them as well.
Page 37 / 148
37
Security settings
Setting security functions for the wireless network
In the next step you can set the encryption and authentication methods for your wire-
less network.
Wireless networks are even more strongly exposed to the risk of eavesdropping than
wired networks. With conventional network adapters an intruder only needs a device
with a WLAN adapter (e.g. a Notebook or a PDA (Personal Digital Assistant)) with an
appropriately configured network card in order to eavesdrop on every communication
made via a nearby wireless LAN.
The Gigaset SE551 WLAN dsl/cable makes use of effective encryption methods to pre-
vent unauthorised eavesdropping as far as possible.
You can use the following security mechanisms:
u
WPA2-PSK or WPA2-PSK / WPA-PSK (see below)
u
WEP encryption (Wired Equivalent Privacy, see page 39)
We recommend using WPA2-PSK if it is supported by all components in your wireless
network.
You will find further options for setting data encryption and authentication in the
Advanced Settings menu (see page 74).
Page 38 / 148
38
Security settings
WPA2 / WPA with Pre-shared key (PSK)
WPA
is a more advanced procedure than WEP for protecting wireless networks. Dynamic
keys based on TKIP (Temporal Key Integration Protocol) offer increased security. The
new standard WPA2 uses AES for the encryption.
WPA-PSK
is a special WPA mode for users at home and in small companies without a
company authentication server. Encryption keys are automatically generated with the
Pre-shared key, automatically changed ( "rekeying") and authenticated between the
devices after a certain period of time (
Rekey Interval
).
ì
Select the option
WPA2
-
PSK
if it is supported by all components in your wireless
network.
or
ì
Select the option
WPA2
-
PSK / WPA-PSK
if some or all components in your wireless
network support WPA with the TKIP protocol.
ì
Enter a key of your choice in the
Pre-shared key
field (min. 8 to max. 63 characters)
and confirm it by repeating the entry.
You must also set the same Pre-shared key for all wirelessly connected PCs.
ì
To go to the next step, click on
Next >
.
Please remember:
Every PC (network adapter) that requires access to a wireless network protected by
WPA must also support WPA. To find out whether and how you can use WPA on your
PC, read your network adapter's operating instructions.
Page 39 / 148
39
Security settings
WEP encryption
WEP (Wired Equivalent Privacy) is an encryption procedure for radio signals in wireless
networks and meets the standard IEEE 802.11.
If you transmit data wirelessly and not all components in your wireless network support
the higher security standard WPA (see page 38), we recommend that you activate
WEP
-
Encryption
on these network components.
You can choose either the standard 64-bit key or the more robust 128-bit key for encryp-
tion. The keys are generated in hexadecimal or in ASCII format. You must use the same
keys for encryption and decryption for the Gigaset SE551 WLAN dsl/cable and all your
wireless network adapters.
ì
Select the
Key length
: 64 bit or 128 bit.
ì
Select the
Input type
, i.e. whether you wish to enter the key manually or have it
generated automatically by means of a
Passphrase
.
Page 40 / 148
40
Security settings
Manual key entry
ì
Select the
Key type
,
Hex
or
ASCII
.
.
If you select
Hex
you can use the characters
0
to
9
and
A
to
F
.
With a 64-bit encryption depth the key is exactly 10 characters long.
An example of a valid key: 1234567ABC
With a 128-bit encryption depth the key is exactly 26 characters long.
An example of a valid key: 234567ABC8912345DEF1234567
If you select
ASCII
you can use the characters
0
to
9
,
A
to
Z
and
a
to
z
plus the special
characters in the ASCII character set.
With a 64-bit encryption depth the key is exactly 5 characters long.
An example of a valid key: GIGA1
With a 128-bit encryption depth the key is exactly 13 characters long.
An example of a valid key: GIGASET_SE551
ì
Confirm the key by entering it again in the
Confirm key
field.
Generating the key by means of a Passphrase
ì
Enter a
Passphrase
(up to 32 characters) and confirm it by entering it again. The key
is generated automatically.
Please remember:
u
It is very
important
that you make a note of the key or passphrase. You will
need this information to configure the wireless network adapters properly.
u
When you have concluded the Security Setup Wizard you must change the
WEP encryption on the wireless network adapters for the connected PCs in the
same way as they will not otherwise be given access to the Gigaset SE551
WLAN dsl/cable's wireless network.

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