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Administering Internet Explorer : Managing Windows Internet Explorer Settings (part 2)

6/19/2011 9:37:23 AM

2. InPrivate Browsing

When IE caches all the data from your browsing sessions, it can improve performance. However, there are times when you or another user may want to surf the Internet but not leave any traces. You can do so with InPrivate Browsing.

Any data collected during an In-Private Browsing session is deleted as soon as the browser session is closed. You can start an InPrivate Browsing session in one of several ways.

If you create a new tab by clicking a blank tab or pressing Ctrl+T, you'll see a screen similar to the one shown in Figure 4. You can then click either Browse With InPrivate or Open An InPrivate Browsing Window. This will open a new IE Windows session in InPrivate mode.

Figure 4. Default new tab

NOTE

If you have modified the default installation of IE by adding plug-ins or add-ons, the screen shown in Figure 4 may not display.

You can also launch an InPrivate browser window using one of the following methods:

  • Select Safety => InPrivate Browsing.

  • Press Ctrl+Shift+P.

Figure 5 shows an InPrivate Browsing window. Notice the InPrivate icon at the beginning of the URL address bar.

Figure 5. InPrivate Browsing window

You can browse the Internet using the InPrivate window just as you would normally. The only difference is that all of the data from the session is deleted as soon as you close the browser.

If you want to prevent users from using InPrivate Browsing, you can do so with Group Policy. Settings exist in both the User Configuration and Computer Configuration nodes. The settings are located in Administrative Templates => Windows Components => Internet Explorer => InPrivate Node. The primary setting is Turn Off InPrivate Browsing.

You can also configure Group Policy to disable toolbars and extensions when InPrivate Browsing starts.

3. InPrivate Filtering

The primary purpose of InPrivate Filtering is to improve your privacy by blocking ads, images, and other tracking content.

Many web pages use content from other websites (referred to as third-party websites). When a third-party website hosts content on different sites that you visit, this third-party website can track your activity.

By default, these third-party websites can track a user's session across 10 different websites. You can change this threshold to any value between 3 and 30. This is based on the default InPrivate threshold setting of 10, shown in Figure 6.

Figure 6. InPrivate Filtering window

InPrivate Filtering logs data from content providers. It can then determine through how many sites a content provider can track a user by analyzing these logs.

If you want to disable InPrivate Filtering, you can do so with Group Policy. Settings exist in both the User Configuration and Computer Configuration nodes. The settings are located in the Administrative Templates => Windows Components => Internet Explorer => InPrivate node. The primary setting is Turn Off InPrivate Filtering.

Several other Group Policy settings exist for InPrivate Filtering:

  • Do Not Collect InPrivate Filtering Data

  • Disable Toolbars And Extensions When InPrivate

  • InPrivate Filtering Threshold

4. SmartScreen Filter

The SmartScreen Filter in IE 8 provides an added layer of protection against phishing sites. Phishing is a form of social engineering whereby users are tricked into going to a malicious website.

NOTE

The SmartScreen Filter replaces the Phishing filter used in Windows Vista.

When a user goes to a malicious website, they are encouraged to reveal sensitive information such as usernames and passwords or banking account information. Other phishing attempts encourage a user to download and install malware on their computer.

However, the SmartScreen Filter works in real time to protect users. It runs in the background and sends web addresses to the Microsoft SmartScreen service. If the visited website is a known phishing or malware site, IE will display a blocking web page and the address bar will appear in red. Users can still choose to ignore the warning and visit the website.

Figure 7 shows how you can access the SmartScreen Filter tools from the Safety drop-down menu.

Figure 7. Accessing the SmartScreen Filter tools

This menu offers three choices:

Check This Website

Select this to check any website you visit. When the SmartScreen Filter is enabled, it automatically checks the website.

Turn Off SmartScreen Filter

This setting toggles back and forth between Turn Off SmartScreen Filter when it is on and Turn On SmartScreen Filter when it is off. Figure 7 shows that this setting is on because the selection allows you to turn it off by selecting Turn Off SmartScreen Filter.

Report Unsafe Website

If you suspect a site is malicious, you can report it via this selection. Microsoft will investigate the site and verify that it is malicious before adding it as a malicious website.

5. Security Zones

Internet Explorer includes four security zones. Each zone has different levels of security enabled based on the trust level of the zone. You can access the security zones property page by clicking Tools => Internet Options and selecting the Security tab.

Figure 8 shows the four security zones with the Internet security zone selected. Each of these zones has default security settings. You can click the Custom Level button and view the individual settings.

Figure 8. IE security zones

The four zones are as follows:

Internet

This includes all Internet-based websites that aren't in either the local intranet zone or the trusted sites zone. This zone has a higher level of security than all other zones except the restricted sites zone.

Security is set to Medium-High for this zone by default.

Local Intranet

Sites from web servers in the local intranet are automatically identified. Because the pages are hosted from an internal web server, they are trusted and security isn't as strict. You can also add websites to this zone.

Security is set to Medium-Low for this zone by default.

Trusted Sites

You can add websites to this zone if you're sure they are safe and you need to do so to ensure all the functions of the website work. Security is relaxed in this zone, adding additional risk, so you should add only sites you trust. By default, the trusted sites zone does not include any sites.

Security is set to Medium for this zone by default.

Restricted Sites

You can add websites to this zone that you need to visit but have known risks. The restricted sites zone adds a higher level of security. It helps protect you when visiting known malicious websites. By default, the restricted sites zone does not include any sites.

Security is set to High for this zone by default.

6. Protected Mode

Protected Mode was introduced in IE 7 on Windows Vista. It's also supported on IE 8 in Windows 7. Protected Mode runs IE in a restricted privilege mode to help protect against different types of malware. It makes it harder for malware to be installed on your computer.

By default, Protected Mode is enabled for the Internet and restricted sites zones but not for the local intranet or trusted sites zones. Figure 9 shows how you can easily tell what zone IE is in and the status of protected mode. They are both displayed on the bottom status bar.

Figure 9. IE security zones

In the figure, the bottom status bar is labeled Internet | Protected Mode: On. This indicates the website is in the Internet zone and Protected Mode is On.

If you trust a website and want to disable Protected Mode without adding the site to the trusted sites zone, you can do so. Figure 8, shown earlier, has a picture of the Internet Options Security tab. The Enable Protected Mode check box can be checked or unchecked. If you modify this setting, you need to close IE and restart it for the change to take effect.

You can ensure that Protected Mode is enabled for any specific zone using Group Policy. Settings exist in both the User Configuration and Computer Configuration nodes. The settings are located in the Administrative Templates => Windows Components => Internet Explorer => Internet Control Panel => Security Page node. Each of the following nodes includes the Turn On Protected Mode setting:

  • Internet Zone

  • Intranet Zone

  • Local Machine Zone

  • Locked-down Internet Zone

  • Locked-down Intranet Zone

  • Locked-down Local Machine Zone

  • Locked-down Restricted Sites Zone

  • Locked-down Trusted Sites Zone

  • Restricted Sites Zone

  • Trusted Sites Zone

When Protected Mode is enabled for the zone, users will be unable to modify the setting.

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