What Are Internet Explorer Security Zones?

May 14, 2008

There are 5 levels of security setting available for each Internet Explorer security zone.
These levels are (from least secure to most secure):

  • Low
  • Medium-Low (default for Local Intranet)
  • Medium (default level for Trusted Sites)
  • Medium-High (default for Internet or unclassified sites)
  • High (default for Restricted Sites)

How to Change the Default Security Level For a Zone

To change the default security level for any zone, perform the following steps:

  1. Open Internet Explorer
  2. On the Tools menu, select Internet Options
  3. Select the tab labeled Security
  4. Select the zone which you want to change the default security level
  5. Slide the bar to the security level that you want to use for that particular zone
  6. Click Apply
  7. Click OK

** Note that not all security levels are available for each zone.


How to Manually Edit Security Settings for a Security Zone

To customize security options for a security zone in Internet Explorer:
(Note: this is only recommended for advanced users)

  1. Open Internet Explorer
  2. On the Tools menu, select Internet Options
  3. Select the tab labeled Security
  4. Select the zone which you want to edit the settings
  5. Click Custom level…
  6. Make desired changes
  7. Click OK
  8. Click Apply
  9. Click OK
  10. You need to close your browser and restart for changes to take effect

For more information see: Windows Security Updates and Nortons.

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