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( Note that you must enter your ISP's DNS servers, by IP address or IP range, to the Trusted Zone in order for OE to work if Internet access is blocked.) This will prevent OE from hitting any site not in the trusted zone, which will significantly increase its security. When OE next opens an HTML based message, no links to embedded images, web bugs, or any other browser based content will be accessed.įor additional security, if your ISP's DNS, Mail and News servers are entered into the Trusted (Local) Zone via Zone Alarm's "Firewall > Zones" interface, and all access to the Internet zone is blocked in the Program Control screen, then Outlook Express will be further restricted. Once this screen is OK'd, all future sessions of Outlook Express will be restricted to only using the specified ports and protocols. (Note that ZA+/ZAP can also allow all ports EXCEPT for those entered in this screen, another very useful configuration option.) This will bring up the Program Options screen:īy default, the option to "Allow access to all ports and protocols" is set, however, in order to restrict OE access as noted above, select the "Allow access for ONLY the ports and protocols checked below" and then use the button to configure the necessary ports. To get to the advanced options for any program listed in ZA, highlight it (OE is in this case), and press the button. First, here is a screen shot of the Program Control window itself:
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The screen shots are from Zone Alarm Plus v3.1.395, but any version of Zone Alarm Plus or Zone Alarm Pro should be able to accommodate these settings. One use that I've made of this functionality was to prevent Microsoft's Outlook Express* from actually using any ports other than those required to access DNS, POP, SMTP and NNTP, thus preventing it from browsing to web sites which might have email usage tracking capability or web bugs. For example, you could prevent a non-browser application from ever accessing port 80 and related HTTP ports, or restrict a program into having access to only a short list of allowed ports. In this post, I will give an overview of some of the advanced capabilities provided within the Program Controls interface of ZA+/ZAP and try to demonstrate a practical use for these capabilities.Īdjusting the advanced options on a program can limit that program's network access permissions and either block or permit its use of specified ports and protocols.
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While not as configurable as most of the rules based firewalls, ZA+/ZAP do provide some additional capabilities that may be worth exploring in order to override some of the basic "set it and forget it" defaults that are provided by the Zone Alarm Free (ZAF) product. Many people run Zone Alarm Plus (ZA+) or Zone Alarm Pro (ZAP) without realizing that these products will allow them to configure some fairly advanced custom settings that can further enhance their PC's networking security.
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The first two posts in this thread remain the same, but, below are updates that show how to achieve the same controls over Outlook Express using ZAP v4.0 With the release of Zone Alarm Pro v4.0, significant changes have been made to the mechanisms used to grant and restrict individual program access rights.
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