3Com WL-308, Руководство пользователя

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18 C
HAPTER
3: C
ONFIGURING
W
ORKGROUP
B
RIDGES
9 Connect the Ethernet devices to the bridges. If you use hubs, make sure that the
workgroup bridges are connected through the hub uplink ports.
Changing Security
Settings
Under System Configuration , click Security Settings . The Security Settings page
appears, where you can select the type of security to be used on the bridge. The
bridge can be configured to support one type of security at a time. You can
change the settings by clicking the radio buttons and entering values in the fields.
When you are finished, click
Enter or Apply
all Changes .
The following sections describe the settings. To maintain wireless association, the
settings on clients and the access points they associate with (or other members of
an ad hoc network) must match exactly.
If you are configuring through a wireless association (not on the wired LAN) and
you reconfigure both the WLAN service area and the security settings, be sure to
click
Enter to save changes temporarily until you are finished. Then click Apply all
Changes . If you apply one set of changes and not the other, the bridge may lose
association with one access point before it is configured to associate with another.
No Security (Open
System)
No encryption is used. The network communications could be intercepted by
unintended recipients.
40-bit Shared Key (Wi-Fi) This option encrypts the wireless transmissions to protect data, but still allows
communication among compatible wireless LAN clients and access points from
third-party manufacturers that are Wi-Fi certified.
This type of security requires you to set up encryption in one of the following
ways:
■
String—For use only with other 3Com 11 Mbps wireless LAN devices, an
encryption string is a case-sensitive string of characters between 6 and 30
characters long. To enter the string, click
Enter a string to generate shared keys .
Then type any combination of letters and numbers in the space provided and
click
Enter or Apply
all Changes .
■
Shared keys—Hexadecimal keys are sequences of hexadecimal digits arranged
into four keys. A hexadecimal digit may be a letter from A to F or a number
from 0 to 9. This type of encryption is compatible with equipment from other
manufacturers that use Wi-Fi certified 40-bit encryption. To enter the keys, click
Specify shared keys and which to use . Then click To specify and select the
shared keys . In the shared keys window, enter all the keys in the provided
spaces, then click a radio button in the Selected Key column to specify which
key to use and click
Enter or Apply
all Changes .
128-bit Shared Key This option can be used with other 3Com 11 Mbps Wireless LAN devices and with
equipment from certain manufacturers that also support 128-bit shared key
encryption. It provides a higher level of security than the 40-bit Shared Key (Wi-Fi)
option and uses a more complicated type of encryption. This type of security
requires you to set up encryption using a string or shared keys as described in
“40-bit Shared Key (Wi-Fi)” on page 18.