Using Kaspersky Anti-Virus
®
for ISA Server
28
Kaspersky Anti-Virus can disinfect only the files transferred
via HTTP protocol. When an infected file is detected trans-
ferred via the FTP protocol, Kaspersky Anti-Virus blocks ac-
cess to the infected object without attempts to disinfect it.
•
Enter the maximum delay time for a chunk of data scanned by the
application in the
Maximum scan time for the first chunk of data, sec
field. This field specifies the time limit for scanning data. After the limit is
reached, scanning is converted into a stream and sent to the client upon
request. This parameter affects the way infected files are treated after
they are detected:
•
If an infected file has been detected and disinfected before the
first chunk of data containing a part of this file was sent to the
client, the client receives the disinfected file.
•
If an infected file was detected after the first chunk of data con-
taining a part of this infected file had been sent to the client, the
program terminates the connection. Upon the second request
for this file, the client will be immediately notified that the re-
quested file is infected.
Upon the second request for this file, the client will be notified that the
requested file is infected only if the time span between the first and the
second requests does not exceed 100 sec. This value cannot be
changed in this version of the program.
•
Specify the time span for sending the next chunk of data to the client
upon request in the
Maximum time span between chunks of data sent
to the client, sec
field.
The value of this field cannot exceed the value of the
Maximum scan
time for the first chunk of data, sec
field.
•
Set the percentage of data accumulated by Kaspersky Anti-Virus
®
for
subsequent analysis and scanning in the
Data not sent to the client
before scan completes, %
field.
The
Enable partial content download
checkbox enables/disables partial
downloading of data in cases, for example, of an Internet connection failure when
downloading a file.
However, note that Kaspersky Anti-Virus
®
is able to detect a malicious code only
if the entire code is present in any part of the downloaded file. If the viral code is
divided into separate parts, Kaspersky Anti-Virus
®
might fail to detect it. In such a
case, after the integrity of the downloaded object is restored, the virus might
penetrate your system.
