integrate barcode scanner into asp.net web application 5: Con gure Windows Defender and Windows Firewall in Software

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5: Con gure Windows Defender and Windows Firewall
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FIGURE 5-10
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Exceptions tab
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Customizing Exceptions However, you can customize the exceptions by adding a program to unblock or adding a port to unblock For example, let s say you have some application installed that uses the Internet in some way, but this application doesn t seem to work You click the Add Program button and Browse your computer to locate the program, and then click OK Furthermore, you can be even more specific by clicking the Add Program button, locating and selecting the program in the Browse list, and then clicking the Change Scope button Here, you can specify that any computer (including those on the Internet) can access the program, or you can limit it to your local network or even local computers on your network if you like, as shown in Figure 5-11 If you have a program that needs a particular port number open, you can click the Add Port button, give the exception name, and enter the port number Certain programs use TCP or UDP ports on the network to communicate Consult your program s documentation to determine if this is something you need to do However, be wary of opening ports Ports are not program-specific, so any application that can use a certain TCP or UDP port that you open will be able to get through the firewall
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Con gure Security Settings in Windows Firewall
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FIGURE 5-11
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Be wary of exam questions that recommend opening ports for communication there is often a more secure way by allowing certain program rather than ports
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If you take a look at the Exceptions tab, you ll see that a number of exceptions are enabled by default, such as Messenger, Network Discovery, Remote Assistance, and such Depending on your computer s networking con guration, File and Printer Sharing may also be enabled Naturally, the exam will give you some scenarios and ask you what you need to do to enable certain programs
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and services to work Two important exceptions to keep in mind:
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If you need to allow Remote Procedure Calls (RPCs), enable the Remote Administration exception If you need to allow Remote Desktop connections, you ll need to enable the exception as well
Advanced Tab
If you click the Advanced tab, you can see which network connections Windows Firewall is protecting, as Figure 5-12 shows If you want to allow more or less connections, select or deselect the check boxes as necessary Remember, however, every network connection on your computer should be protected by the firewall
5: Con gure Windows Defender and Windows Firewall
FIGURE 5-12
Advanced tab
Con guring Windows Firewall Advanced Settings
If you have used Windows Firewall s previous versions, you may wonder where some additional features, such as ICMP settings and logging settings, are located In Windows Vista, there is yet another interface you use to configure Windows Firewall Advanced Settings Open Administrative Tools in Control Panel and then open Windows Firewall with Advanced Security The Advanced Security interface, shown in Figure 5-13, allows you to configure both Inbound and Outbound rules, which you ll need to do in order to complete some security requirements As you can see, standard inbound and outbound rules are already enabled, but you can use this MMC to configure specific rules to meet specific needs You must be logged in as an Administrator to make any changes to the Advanced Security features First things first, you can click the Windows Firewall with Advanced Security option in the left tree pane to see an overview of your settings, shown in Figure 5-14
Con gure Security Settings in Windows Firewall
FIGURE 5-13
Windows Firewall with Advanced Security
Notice that you have a domain profile, a private profile, and a public profile Click the Windows Firewall Properties link in the center pane under the three profiles This opens the Windows Firewall with Advanced Security on Local Computer properties dialog box Notice that on the Domain Profile, Private Profile, and Public Profile tabs, you can examine the current firewall state, configure settings, and turn on and configure logging for that profile, shown in Figure 5-14
Domain Pro le The domain pro le determines the rewall s settings when you you are connected to Windows network connected to Windows domain domain networkThe Private Pro le determines the The private pro le determines the rewall s rewall s settings when you are connected settings when you are connected to a to a private network location, the public private network location, and and the Public Pro le determines the settingsyou pro le determines the settings when when
you are connected public network location are connected to a to a public network location Let s say a user on your on your Let s say you have you have a usernetwork network who needs her laptop computer s who needs her laptop computer s rewall rewall con gured differently for a con gured differently for a private network private network than the public network than the public network she accesses You she use these tabs to con gure different can accesses You can use these tabs to con gure different settings for the pro les settings for the pro les
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