A single server or an entire web domain can be allowed. For example, to allow Interstitial pages at www.popupcop.com, enter this server name into the Allow List. To allow Interstitial pages from all the web servers (e.g. www.popcop.com, secure.popupcop.com, etc.) in the popupcop.com web domain, enter *.popupcop.com into the Allow List. This mechanism operates independently of IE's security zones.

The Blocking type radio buttons allow you to specify a general rule that PopUpCop will use to determine whether to block Interstitial pages at a particular page. You can always override this rule by adding sites to the block or allow lists.

• If you choose the option Block all (except for those on your allow list), PopUpCop will block all Interstitial pages.
  
  
• If you choose the option Block Interstitial pages only at sites on the block list, PopUpCop will block Interstitial pages only if the current Web page is found on the Interstitial pages block list.

The Allow Interstitial pages from all these sites check boxes allow you to specify a general rule that PopUpCop will use to determine whether to block a particular Flash movie. You can always override this rule by adding sites to the block or allow lists.

• If you check the option Secure sites ("https://"), PopUpCop will allow Interstitial pages at all secure sites.
• If you check the option My computer, PopUpCop will allow Interstitial pages from Web pages on your computer.
• If you check the option Local Intranet zone, PopUpCop will allow Interstitial pages from Web pages in this security zone. This zone generally includes sites in your home or company's intranet.
• If you check the option Trusted sites zone, PopUpCop will allow Interstitial pages from Web pages in this security zone.

PopUpCop helps you form the proper URL to enter in the Enter new page, server or domain dialog. When you click on New (or select an entry in either list and click Edit) then you see this dialog:

This allows you to type in the URL (web address) of sites that you want to add to either list. The two buttons on the right, Make server and Make domain are URL helper tools. They allow you to take a complicated URL and quickly turn it into either a server address or a domain address.

For example, if you copy a URL from your browser, such as, http://www.popupcop.com/help.html?version=2.5.0.01&src=PopUpCop and then you paste this into the type-in field, clicking the buttons will simplify the URL and make it into a server or domain. Clicking Make server gives www.popupcop.com and clicking Make domain gives *.popupcop.com. The asterisk (*) tells PopUpCop to match any characters in the name. Thus, you can filter on similar domain names, such as abcdserver.com and xyzserver.com, by entering *server.com.

The Delete button removes the selected items from the list. To remove more than one at a time Ctrl-left-click on the items and then click the Delete button. A confirmation dialog appears for you to accept or cancel the delete action.