D-Link DFL-2500 User Guide - Page 175
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156 Chapter 18. Application Layer Gateway (ALG) ActiveX objects An ActiveX object is a HTTP component, which is downloaded and executed on the client computer. Because it is executed on the client, certain security issues exists, which could cause harm to the local computer system. JavaScript/VBScript In order to display more advanced and dynamic HTML pages, scripts can be used. A script is executed by the web browser, and can be used to control the browser functionality, validate user's input, or a number of other features. It could potentially be used by an attacker in an attempt to cause harm to a computer system, or to cause various annoyances, such as pop-up windows. Java Applets A java applet is written in JAVA programming language, and a java-enabled browser can download and execute this code on the client computer. An applet can contain malicious code, which lead to security problems. Cookies A cookie is a small text file, stored locally on the client computer. Its objective is to make a web server remember certain information about a user, which has been entered previously. This can also contain confidential information. 18.3.2 Solution D-Link firewalls address the security issues shown in the previous section by Stripping Contents and URL Filtering. Stripping Contents In D-Link HTTP ALG configuration, some or all of the active contents mentioned previously can be stripped away from HTTP traffic upon administrator's requests. D-Link Firewalls User's Guide
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