zxing barcode generator java example Installing and Troubleshooting a Wireless LAN in Software

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Installing and Troubleshooting a Wireless LAN
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Wireless Network Connection dialog
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Installation and Con guration Procedures
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Install a PC Card Client Device If your installation includes laptops without built-in wireless connectivity, you ll have to decide on a method for providing wireless support For this installation, you ll use the Proxim Orinoco 11b/g Gold card as shown in Figure 7-15 This card works with any 80211b or 80211g network and supports the WPA requirements of the network you ve built
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Another advantage of the Orinoco 11b/g Gold card is its support for an external antenna Other PC Cards provide this support as well, but most cards include a built-in antenna with no expandabilityThe use of an external antenna with this card is valuable for site surveys and security penetrationtesting scenarios Similar to the PCI device, the first step to installing this card is to install it physically in the computer Because the card is a PC Card, you can install it while the laptop is on, or you can install it while the laptop is off and then power the laptop on I suggest installing the software from Proxim first and then inserting the PC Card When you insert the accompanying CD-ROM and launch the SETUPEXE program, you ll see a screen like the one shown in Figure 7-16 When you click Next, installation begins You ll be asked to accept the license agreement and then you must decide if you want to install the driver only or the driver and the Orinoco Wireless Utility For this example, you ll install both After you select the file location and the Program Group name, the file copying process begins Once it s complete, a quick click of the Finish button finalizes the operation
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Orinoco 11b/g Gold card (Photo Courtesy of Proxim Wireless)
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7:
Installing and Troubleshooting a Wireless LAN
FIGURE 7-16
Orinoco installation program
When you insert the wireless card into an available PC Card slot, it s detected automatically You can then launch the wireless client utility from Orinoco If WZC is turned on, the utility gives you the option to turn it off Elect to do so and you are presented with the screen shown in Figure 7-17 To configure the device for the WINET wireless network, select the Profile Management tab and click Modify Here you can enter the SSID Then you click the Security tab, where you can configure the WPA settings Figure 7-18 shows the resulting dialog screens With these configuration parameters set, the client is ready to use the wireless network If a wireless client is receiving weak signals or dropped connections with this configuration, provide the client with an external antenna (using an MC connector type) to provide better signal reception and transmission Remember, the MC connecter type is susceptible to damage, so use them with caution
Configure a Built-in Wireless Device Built-in wireless devices in laptops are usually preconfigured from the manufacturer; however, newer device drivers may be available and may improve performance, so you should evaluate this Once the
Installation and Con guration Procedures
FIGURE 7-17
Orinoco client utility
drivers are installed, you can usually configure the device through the Device Manager in Windows-based systems The screen in Figure 7-19 shows the configuration interface provided by the Device Manager
Configure a Client to Connect with VPN As you may remember, the original specifications for this installation stated that a user should be able to connect to the network from home using an Internet connection and a VPN client You configured
FIGURE 7-18
Security configuration screens
7:
Installing and Troubleshooting a Wireless LAN
FIGURE 7-19
Configuring a builtin wireless device
the VPN service in the Buffalo Air Station router, so all that s left to do is configure the clients to connect to the VPN server You can do this yourself, or users can do it according to your instructions Either way, assuming they are using Windows XP, you can create a VPN connection to a PPTP-based VPN server easily To create the VPN connection, follow these steps: 1 Click Start and select Connect To and Show All Connections 2 Click the Create A New Connection option on the left-side menu (Figure 7-20) 3 Click Next 4 Select Connect To The Network At My Workplace and click Next 5 Select Virtual Private Network Connection and click Next (Figure 7-21) 6 Enter a company name or a name for the connection and click Next 7 Enter the domain name pptpvpn4-winetnet, which is the name used through dynamic DNS to connect to the Buffalo Air Station router (refer back to Figure 7-8 earlier in this chapter) 8 Click Next and then click Finish
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