rdlc ean 13 6: Configuring Wireless Connectivity in Software

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6: Configuring Wireless Connectivity
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Figure 6-9 WAP basic wireless settings
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NOTE The button for SES is for Secure Easy Setup It s designed for nonnetworking professionals so that they can easily configure their wireless network with WPA encryption simply by pressing the button on the wireless router and on the screen
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Most wireless access points have the ability to restrict connections except for computers with specific media access control (MAC) addresses Any computers identified with a different MAC address would be denied access TIP Each NIC has a MAC assigned to it It s composed of six sets of hexadecimal pairs (such as 00-16-17-D9-12-C3)You can view the MAC address of your NIC by entering IPConfig /All at the command line The MAC address is listed as the Physical Address
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Figure 6-10 shows the screen within the Linksys WAP that will allow you to enable MAC filtering The Wireless MAC Filter is set to Enable
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Figure 6-10
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Enabling MAC filtering on a WAP
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When working with security, there is never a single thing that you can do to fully ensure you are protected Think about a bank A bank has video cameras, guards, silent alarms, exploding ink packs, vaults, and more to protect itself (and your money) In other words, multiple defenses are enabled This is also referred to as defense in depth When implementing security for a wireless network, many of the methods can be beaten individually The single most important step today is to implement WPA or WPA2, but additional methods (such as disabling SSID broadcast and using MAC filtering) can be added to lock your network down even more If your network is significantly locked down, but your neighbor s is not, which one will an attacker choose Often the easier target is attacked It reminds me of an old logic problem If you and five other people are being chased by a bear, how quick do you have to run to escape The answer is that you only have to run quicker than the slowest person
6: Configuring Wireless Connectivity
By clicking the Edit MAC Filter List, you can add the MAC addresses of clients you want to allow to connect All other clients will be denied While using MAC filtering is a good practice, you should be aware that it is also beatable Packets broadcast over the air can be captured by a wireless receiver Embedded in the packets are the MAC addresses Once the acceptable MAC addresses are discovered, software can be used to spoof (impersonate) the accepted MAC addresses
Network Discovery
Network discovery on a wireless network works the same way as it does on a wired network as presented in 5 The Link-Layer Topology Discovery (LLTD) protocols allow devices (such as computers) to see other devices on the network The primary network discovery settings are
On Allows this computer to find other computers and allows other computers to find it Off Prevents other computers from finding this computer and prevents this computer from finding other computers using LLTD
The network discovery setting is directly affected by the network location configured on the Windows Vista computer The network location can be set as Public or Private EXAM TIP Network Discovery works the same way on wireless networks as it does on wired networksYou would set it to Public when in a public location and network discovery is turned off, making it harder for your computer to be located When in a private network, you would set it to Private and network discovery is turned on
Public Public indicates the computer is connected to a public network location such as in an airport or a coffee shop To protect the computer, network discovery is turned off, making the computer harder to find Private Private indicates the computer is operating in a private network such as a home or work network When first configuring a connection, you are presented with a choice similar to Figure 6-11 Selecting Home or Work is identical to configuring the network as Private Access to the Internet is via a router
If your computer is connected directly to the Internet, or connected to the Internet via a publicly accessible network, you should set the network location to Public Network discovery will be turned off On the other hand, if you are not directly connected to the Internet, but instead in a private network, you can set the network location to Private Network discovery will be turned on and your computer can find other computers on the network, and other computers can find your computer
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