ESET SMART SECURITY Betriebsanweisung PDF herunterladen (Seite 20)

Warning: In the Default mode, the entire archive ﬁle is deleted only

if all ﬁles in the archive are infected. If the archive also contains

legitimate ﬁles, it will not be deleted. If an infected archive ﬁle is

detected in Strict cleaning mode, the entire archive will be deleted,

even if clean ﬁles are present.

4.1.6.4 Extensions

An extension is part of the ﬁle name delimited by a period. The

extension deﬁnes the type and content of the ﬁle. This section of the

ThreatSense parameter setup lets you deﬁne the types of ﬁles to scan.

By default, all ﬁles are scanned regardless of their extension. Any

extension can be added to the list of ﬁles excluded from scanning.

If the Scan all ﬁles option is deselected, the list changes to show

all currently scanned ﬁle extensions. Using the Add and Remove

buttons, you can enable or prohibit scanning of desired extensions.

To enable scanning of ﬁles with no extension, select the Scan

extensionless ﬁles option.

Excluding ﬁles from scanning is sometimes necessary if scanning

certain ﬁle types prevents the program which is using the extensions

from running properly. For example, it may be advisable to exclude

the .edb, .eml and .tmp extensions when using Microsoft Exchange

servers.

4.1.6.5 Limits

The Limits section allows you to specify the maximum size of objects

and levels of nested archives to be scanned:

Maximum object size: – Deﬁnes the maximum size of objects to

be scanned. The given antivirus module will then scan only objects

smaller than the size speciﬁed. We do not recommend changing the

default value, as there is usually no reason to modify it. This option

should only be changed by advanced users who have speciﬁc reasons

for excluding larger objects from scanning.

Maximum scan time for object (sec.): – Deﬁnes the maximum time

value for scanning an object. If a user‑deﬁned value has been entered

here, the antivirus module will stop scanning an object when that

time has elapsed, regardless of whether the scan has ﬁnished.

Archive nesting level: – Speciﬁes the maximum depth of archive

scanning. We do not recommend changing the default value of 10;

under normal circumstances, there should be no reason to modify it.

If scanning is prematurely terminated due to the number of nested

archives, the archive will remain unchecked.

Maximum size of ﬁle in archive: – This option allows you to specify

the maximum ﬁle size for ﬁles contained in archives (when they

are extracted) that are to be scanned. If scanning of an archive is

prematurely terminated for that reason, the archive will remain

unchecked.

4.1.6.6 Other

Scan alternate data streams (ADS) – Alternate data streams (ADS)

used by the NTFS ﬁle system are ﬁle and folder associations which are

invisible from ordinary scanning techniques. Many inﬁltrations try to

avoid detection by disguising themselves as alternative data streams.

Run background scans with low priority – Each scanning sequence

consumes a certain amount of system resources. If you work with

programs that place a high load on system resources, you can

activate low priority background scanning and save resources for your

applications.

Log all objects – If this option is selected, the log ﬁle will show all the

scanned ﬁles, even those not infected.

Enable Smart optimization – Select this option so that ﬁles which

have already been scanned are not scanned repeatedly (unless they

have been modiﬁed). Files are scanned again immediately after each

virus signature database update.

Preserve last access timestamp – Select this option to keep the

original access time of scanned ﬁles instead of updating it (e.g., for use

with data backup systems).

Scroll log – This option allows you to enable/disable log scrolling. If

selected, information scrolls upwards within the display window.

Display notiﬁcation about scan completion in a separate window

– Opens a standalone window containing information about scan

results.

4.1.7 An inﬁltration is detected

Inﬁltrations can reach the system from various entry points;

webpages, shared folders, via email or from removable computer

devices (USB, external disks, CDs, DVDs, diskettes, etc.).

If your computer is showing signs of malware infection, e.g., it is

slower, often freezes, etc., we recommend that you do the following:

• Open ESET Smart Security and click Computer scan

• Click Smart scan (for more information, see section 4.1.4.1.1,

“Smart scan”)

• After the scan has ﬁnished, review the log for the number of

scanned, infected and cleaned ﬁles.

If you only wish to scan a certain part of your disk, click Custom scan

and select targets to be scanned for viruses.

As a general example of how inﬁltrations are handled in ESET Smart

Security, suppose that an inﬁltration is detected by the real‑time ﬁle

system monitor, which uses the Default cleaning level. It will attempt

to clean or delete the ﬁle. If there is no predeﬁned action to take for

the real‑time protection module, you will be asked to select an option

in an alert window. Usually, the options Clean, Delete and Leave are

available. Selecting Leave is not recommended, since the infected

ﬁle(s) would be left untouched. The exception to this is when you are

sure that the ﬁle is harmless and has been detected by mistake.

Cleaning and deleting – Apply cleaning if a ﬁle has been attacked

by a virus which has attached malicious code to the ﬁle. If this is the

case, ﬁrst attempt to clean the infected ﬁle in order to restore it to its

original state. If the ﬁle consists exclusively of malicious code, it will be

deleted.

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