F-SECURE ANTI-VIRUS FOR MICROSOFT EXCHANGE 8.00 - Administrator's Manual - page 134
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5.4.2
Virus Scanning
Specify scanning engines to be used when F-Secure Content Scanner
Server scans files for viruses, and the files that should be scanned.
Scan Engines
Scan engines can be enabled or disabled. If
you want to disable the scan just for certain
files, enter the appropriate file extensions to
Excluded extensions field and separate each
extension with a space. The Excluded
extensions field supports * and ? wildcards.
Action if Engine
Malfunctions
Specify how the product reacts if it cannot
scan a file.
Return Scan Error - Drop the file being
scanned and send a scan error.
Scan with Other Engines - Scan the file with
other available scan engines.
Scan Inside Archives
Specify whether files inside compressed
archive files should be scanned for viruses, if
they are not excluded from scanning.
Scanning inside archives takes time.
Disabling scanning inside archives improves
performance, but it also means that the
network users need to use up-to-date virus
protection on their workstations.
Max Levels in Nested
Archives
If Scan Inside Archives is enabled, F-Secure
Content Scanner Server can scan files
inside archives that may exist inside of other
archives. Furthermore, these nested
archives can contain other archives.