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54
Appendix B: Wireless Security
What Are The Risks?
Wireless-G PrintServer for USB 2.0
The solution, then, is to segment your network up into multiple groups. If your network had 80 users and you
used four WEP keys, a hacker would have access to only ¼ of your wireless network resources. In this way,
multiple keys reduce your liability.
Finally, be sure to change your WEP key regularly, once a week or once a day. Using a “dynamic” WEP key, rather
than one that is static, makes it even harder for a hacker to break into your network and steal your resources.
WEP Encryption
There are two ways to enable WEP encryption for the PrintServer. The first way is through the Setup Wizard, and
the second way is through the web-based utility. To use the Setup Wizard, refer to “Chapter 4: Configuring the
PrintServer Using the Setup Wizard.” To use the web-based utility, follow these instructions:
1.
Click the
Wireless
tab of the web-based utility.
2.
Click the
Security tab
. See Figure B-2.
3.
From the
WEP Encryption
drop-down menu, select
64 Bit Keys (10 Hex chars)
or
128 Bit Keys (26 Hex
chars)
, depending on the level of encryption your wireless network uses.
4.
From the
Security Mode
drop-down menu, select your wireless network’s authentication type,
Open System
,
Shared Key
, or
Auto
. If you are not sure which type to choose, select
Auto
, which will enable the PrintServer
to automatically use Open System or Shared Key authentication, depending on the authentication being used
by your wireless network.
5.
Select the Default Transmit Key used by your wireless network.
6.
Enter a Passphrase in the
Passphrase
field, and click the
Generate Keys
button. The Passphrase is case-
sensitive and should have 16 alphanumeric characters or fewer.
7.
If you do not want to use a Passphrase, then enter the WEP keys manually in the
Key 1
to
Key 4
fields. Each
WEP key must consist of valid hexadecimal characters, the letters “A” through “F” and numbers “0” through
“9”. For 64-bit WEP encryption, the key must consist of exactly 10 hexadecimal characters. For 128-bit WEP
encryption, the key must consist of exactly 26 hexadecimal characters.
8.
Click the
Save
button to apply your changes.
Important:
Always remember that each
device in your wireless network MUST use
the same WEP encryption method and
encryption key or your wireless network will
not function properly.
Figure B-2: Wireless Tab - Security
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55
Appendix C: About Bi-Directional Printing
Wireless-G PrintServer for USB 2.0
Appendix C: About Bi-Directional Printing
Normal printing only sends print signals from a PC to a printer. Bi-directional printing, also called bitronic printing,
refers to a printer’s ability to do just the opposite—talk back to a PC to notify it of a print job status, paper jams, etc.
This two-way communication technology can be found in HP, IBM, Panasonic, and other laser or color printers where
close contact between the PC and printer is key. In color printing, for example, the printer “informs” the PC of its
constant status in order to mix color inks correctly for optimal quality output.
Bi-directional communication, communication from a printer to a PC, is normally handled by a combination of the
printer hardware and special software on your computer. Bi-directional printers generally have highly advanced
parallel interfaces. These printers often require special parallel ports in order to take full advantage of their features.
Using a bi-directional printer on a network poses unique challenges. Unlike a direct PC-to-printer connection during
which a bi-directional printer can easily send its signals back to the host PC through the computer’s parallel port
(which is normally located only a few feet away from the printer), a networked printer faces the problem of having to
route messages bound for a particular PC through a large array of hubs, switches, file servers, and computers.
Unfortunately, most printers are not equipped to handle the complexities of printer-to-PC communication across a
network. That does not mean that they can’t be used on a network, however.
Linksys designed the PrintServers to function with both regular as well as bi-directional printers. Standard print
servers cannot work with bi-directional printers, but the PrintServer features a custom design to support both parallel
as well as bi-directional parallel interfaces. However, the PrintServer cannot pass messages from the printer back to
the printing PC—this limitation is simply an industry standard, and not one of the PrintServer itself.
However, the PrintServer can check any printer’s online and printing status on the network using the Bi-Admin
management utility software packaged with the PrintServer. The status-checking feature built into the management
software does not require a bi-directional printer to function. If your printer came with special bi-directional software
allowing you to monitor printer status, do not use it with the PrintServer—the software is most likely not network-
capable. For best results, turn off the printer’s bi-directional function either by (1) removing any bi-directional printing
software from your network computers, and/or (2) turning off the printer’s bi-directional print feature inside of the
printer’s on-board menus (if it has menus). Your printer’s user guide should be able to provide specific instructions for
doing this.
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56
Appendix D: Upgrading Firmware
Wireless-G PrintServer for USB 2.0
Appendix D: Upgrading Firmware
The PrintServer’s firmware is upgraded through the Bi-Admin Management utility. Follow these instructions:
1.
Download the firmware from Linksys’s website at
www.linksys.com
.
2.
Open the Bi-Admin Management utility.
3.
Click
Main
=>
Upgrade Firmware
.
4.
Click the
Files...
button to browse for the file.
5.
The
Detected LAN Cards
screen will appear, as shown in Figure C-2. Select the LAN card the PrintServer is
connected to, and then click the
OK
button. Select the firmware file you want to use.
6.
View the
BIN File Information
screen, and click the
OK
button if you have selected the correct firmware file.
Click the
Cancel
button to select a different firmware file.
7.
On the
Upgrade
screen, click the
Upgrade
button. Click the
Cancel
button to cancel the firmware upgrade.
For more information, click the
Help
button.
Figure D-1: Upgrade Firmware
Figure D-2: Detected LAN Cards
Figure D-3: BIN File Information
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57
Appendix E: Windows Help
Wireless-G PrintServer for USB 2.0
Appendix E: Windows Help
All Linksys wireless products require Microsoft Windows. Windows is the most used operating system in the
world and comes with many features that help make networking easier. These features can be accessed through
Windows Help and are described in this appendix.
TCP/IP
TCP/IP is a set of instructions, or protocol, all PCs follow to communicate over a network. This is true for wireless
networks as well. Your PCs will not be able to utilize wireless networking without having TCP/IP enabled.
Windows Help provides complete instructions on enabling TCP/IP.
Shared Resources
If you wish to share printers, folder, or files over your network, Windows Help provides complete instructions on
utilizing shared resources.
Network Neighborhood/My Network Places
Other PCs on your network will appear under Network Neighborhood or My Network Places (depending upon the
version of Windows you're running). Windows Help provides complete instructions on adding PCs to your
network.
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58
Appendix F: Glossary
Wireless-G PrintServer for USB 2.0
Appendix F: Glossary
802.11a
- An IEEE wireless networking standard that specifies a maximum data transfer rate of 54Mbps and an
operating frequency of 5GHz.
802.11b
- An IEEE wireless networking standard that specifies a maximum data transfer rate of 11Mbps and an
operating frequency of 2.4GHz.
802.11g
- An IEEE wireless networking standard that specifies a maximum data transfer rate of 54Mbps, an
operating frequency of 2.4GHz, and backward compatibility with 802.11b devices.
Access Point
- Device that allows wireless-equipped computers and other devices to communicate with a wired
network. Also used to expand the range of a wireless network.
Adapter
- This is a device that adds network functionality to your PC.
Ad-hoc
- A group of wireless devices communicating directly with each other (peer-to-peer) without the use of
an access point.
Backbone
- The part of a network that connects most of the systems and networks together, and handles the
most data.
Bandwidth
- The transmission capacity of a given device or network.
Beacon Interval
- The frequency interval of the beacon, which is a packet broadcast by a router to synchronize a
wireless network.
Bit
- A binary digit.
Boot
- To start a device and cause it to start executing instructions.
Bridge
- A device that connects two different kinds of local networks, such as a wireless network to a wired
Ethernet network.
Broadband
- An always-on, fast Internet connection.
Browser
- A browser is an application program that provides a way to look at and interact with all the
information on the World Wide Web.
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