User Guide - Kaspersky Lab

Web Anti-Virus 111
To modify a preinstalled security level:
1. Open the application settings window and select Web Anti-Virus under
Protection.
2. Click on Customize under Security Level (cf. Figure 31).
3. Edit browsing protection parameters in the resulting window and click
OK.
9.2. Configuring Web Anti-Virus
Web Anti-Virus scans all objects that are loaded on your computer via the HTTP
protocol, and monitors any WSH scripts (JavaScript or Visual Basic Scripts, etc.)
that are 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
application databases (cf. Section 9.2.1, p. 111)
• Create a list of trusted web addresses (cf. Section 9.2.2, p. 113)
• Enable / disable heuristic analysis (cf. Section 9.2.3, p. 114)
It is also possible to select the actions that Web Anti-Virus will take in response
to discovering dangerous HTTP objects.
The following sections examine these settings in detail.
9.2.1. 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 application databases 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.