User manual KASPERSKY ANTI-VIRUS 6.0 REV 01-2006

[. . . ] KASPERSKY LAB Kaspersky® Anti-Virus 6. 0 USER GUIDE KASPERSKY ANTI-VIRUS 6. 0 User Guide © Kaspersky Lab http://www. kaspersky. com Revision date: January 2006 Table of Contents CHAPTER 1. THREATS TO COMPUTER SECURITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sources of Threats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How threats spread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] To modify a preinstalled security level: click the Customize button in the Web Anti-Virus settings window. 98) in the window that opens, and click OK. 98 Kaspersky Anti-Virus 6. 0 9. 2. Configuring Web Anti-Virus Web Anti-Virus scans all objects that are loaded on your computer via HTTP and monitors any WSH scripts (JavaScript or Visual Basic Scripts, etc. ) run. You can configure Web Anti-Virus settings to increase component operation speed, specifically: · · Set the scanning algorithm by selecting a complete or limited set of threat signatures Creating a list of trusted web addresses It is also possible to select the actions that Web Anti-Virus will take in response to discovering dangerous HTTP objects. Setting a scan method You can scan data from the Internet using one of the following algorithms: · Streaming scan ­ this method for detecting malicious code in network traffic scans data on the fly: as a file is downloading from the Internet, Web Anti-Virus scans the file's portions as they are downloaded, which delivers the scanned object to the user more quickly. At the same time, a limited set of threat signatures is used to perform streaming scans (only the most active threats), which significant lowers the security level for using the Internet. Buffering scan ­ this method scans objects only after they have been fully downloaded to the buffer. After the scan is complete, the program either passes the object to the user or blocks it. When using this scan type, the full threat signature set is used, which improves the level of malicious code detection. However, using this algorithm increases object processing time, and hence makes web browsing slower: it can also cause problems when copying and processing large objects because the connection with the HTTP client can time out. One way to solve this problem is to limit the caching time for object fragments downloaded from the Internet. When the time limit expires, the user will receive the downloaded part of the file without it being scanned, but once the object is fully copied, it will be scanned in its entirety. This can deliver the object to the user faster and solve the problem of interrupting the connection without reducing security while using the Internet. · Web Anti-Virus 99 To select the scanning algorithm that Web Anti-Virus will use: 1. Click on the Customize button in the Web Anti-Virus configuration window. 30), select the option you want in the Scan method section. By default, Web Anti-Virus performs a buffered scan on Internet data, and uses the complete threat signature set. The default caching time for file fragments is one second. Figure 30. If you encounter problems accessing resources like Internet radio, streaming video, or Internet conferencing, use streaming scan. 9. 2. 2. Creating a trusted address list You have the option of creating a list of trusted addresses whose contents you fully trust. Web Anti-Virus will not analyze data from those addresses for dangerous objects. This feature can be used if Web Anti-Virus hinders downloading a certain file by blocking an attempt to download it. 100 Kaspersky Anti-Virus 6. 0 To create a list of trusted addresses: 1. Click on the Customize button in the Web Anti-Virus configuration window. To do so, use the buttons to the right of the list. When entering a trusted address, you can create masks with the following wildcards: * ­ any combination of characters. [. . . ] It shall be at the absolute discretion of Kaspersky Lab whether or not you have satisfied this condition for the provision of Support Services. Kaspersky Lab's technical support service is also entitled to demand from the End User additional registration for identifier awarding for Support Services rendering. Until Software activation and/or obtaining of the End User identifier (Customer ID) technical support service renders only assistance in Software activation and registration of the End User. (ii) By completion of the Support Services Subscription Form you consent to the terms of the Kaspersky Lab Privacy Policy, which is deposited on www. kaspersky. com/privacy, and you explicitly consent to the transfer of data to other countries outside your own as set out in the Privacy Policy. [. . . ]