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4: Con gure Windows Aero and Internet Explorer
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FIGURE 4-11
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Security zones
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There are four preconfigured levels of security that you can select for each zone by simply moving the slider bar:
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Using this setting, all features that are less secure are disabled This is the safest way to use the Internet, but it provides you with the least amount of functionality All ActiveX content is disabled along with all downloads Additionally, there are a number of restrictions on accessing data and requesting data The medium setting does not allow the downloading of unsigned ActiveX controls, and you see the familiar prompt before downloading potentially unsafe content Browsing is safe, yet functional under this setting, and in most cases, this is the best setting to use
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The Medium-Low setting will run most content without prompts, but still does not allow unsigned ActiveX controls This setting is safe for intranet use The low setting provides basic warnings and few safeguards All active content can run This setting is not recommended unless the site is one you completely trust
Low
You can configure different settings for each zone by simply selecting the zone and moving the slider bar However, you can also custom-create the settings by clicking Custom Level This opens the Security Settings dialog box, as shown in Figure 4-12 You can scroll through the list of settings and choose the Disable, Enable, or Prompt option for each security setting This enables you to create a custom security setting that invokes the features that you want instead of the default options You can use the default settings, but you can also customize each zone to meet your needs The following sections give you some pointers for customizing each security zone
FIGURE 4-12
Custom Level settings
4: Con gure Windows Aero and Internet Explorer
Internet and Intranet Zones
The Internet zone is the place to strike a balance between functionality and security In the same manner, the Intranet zone is typically the place you go for more functionality and less concern about security As a general rule, the default settings that you see are best, but you can certainly customize them using the Custom Level button If you decide to customize, keep the following points in mind:
For the Internet zone, keep in mind the highest security settings possible,
but maintain good usage features Low security settings may make browsing easier, but you are asking for trouble As you customize, keep the concept of balance in mind and you ll make the best decisions The exam will expect to balance the security needs with the usage needs
The default setting for the Intranet zone is Medium-Low You can basically
use the intranet in any way, but unsigned ActiveX controls will not be allowed In some cases, you may even want to use the Low setting, if you are certain all of the content on your intranet is safe If it is, then the Low setting will not prevent any active content from running
Trusted Sites Zone
If you configure security settings, some content from some Web sites may get blocked However, what if you use a site regularly that has content that would normally not be allowed by IE No problem, you can configure the site as a trusted site, and in order to do that, IE gives you a Trusted Sites zone When a site is added to the trusted sites list, then the Low security setting is used when that site is accessed This allows you to freely use the site without any security restrictions To add trusted sites to your Trusted Sites zone, follow these steps: 1 On the Security tab, click the Trusted Sites zone, and then click Sites 2 In the Trusted Sites dialog box, enter the URL of the trusted site and click Add, as you can see in Figure 4-13 Repeat this process to add other sites Note that you can remove sites at any time by using the Remove button, and you can also require server verification (if supported by the site) for sites in the zone However, the Require Server Verification setting will slow down the performance of the Web site noticeably and cause failure to load Web pages if certificate errors occur Click OK when you are done
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