102 lines
5.8 KiB
HTML
102 lines
5.8 KiB
HTML
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<meta name="DC.Title" content="Examples: Scan for viruses and files being opened" />
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<meta name="abstract" content="These examples show what the exit program can scan for." />
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<meta name="description" content="These examples show what the exit program can scan for." />
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<title>Examples: Scan for viruses and files being opened</title>
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</head>
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<body id="rzaaxscanex"><a name="rzaaxscanex"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Examples: Scan for viruses and files being opened</h1>
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<div><p>These examples show what the exit program can scan for.</p>
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<div class="section"> <ul><li>Viruses <p>The exit programs can scan for viruses. If a virus is located
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in a file, the anti-virus program can act accordingly by repairing the problem
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or by attempting to quarantine the virus. Since the iSeries™ server itself would not be infected
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by the virus, what this accomplishes is a reduction in virus transmissions
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between servers.</p>
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</li>
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<li>Calls to know when a file was opened <p>You may also scan to find out
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when a file was opened. By enacting this scan, you are able to track the date
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and time of when certain files were accessed. This would be useful when you
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want to track the behavior of certain users.</p>
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</li>
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</ul>
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</div>
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<div class="section"><p>The scan can occur at two different time depending on how the
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system values are set and how the scan environment is established. The following
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list describes different kinds of scanning depending on the time they occur.</p>
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</div>
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<div class="section"> <ol><li>Runtime scanning <p>A runtime scan is a scan on a file or files during
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normal day-to-day activities. This ensures the integrity of your files every
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time they are accessed. Scanning during your normal activities allows you
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to ensure that your file or files are current for whatever standards you are
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scanning.</p>
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<p><strong>Example of a runtime scan for viruses</strong></p>
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<p>You
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choose to access a file on the integrated file system from your PC. When the
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file is opened from the PC, it is scanned. Because an open exit program is
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registered and the QSCANFS system value is set to scan files in the "root"
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(/), QOpenSys and UDFS file systems. The scan shows one virus is found and
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the anti-virus exit program proceeds to repair the problem. After the exit
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program repairs the file, the file is no longer infected. Thus, the access
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from the PC is not infected and it cannot spread the infection.</p>
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<p>Now
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say that instead of scanning for viruses on that access, you choose not to
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do a runtime scan. Then, after accessing the infected file from your PC, the
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virus might be transferred to your PC. By employing a runtime scan, the virus
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can be detected before it spreads to your PC.</p>
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<p>The
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main shortcoming of this method is that resource time is required to do the
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scans. Users attempting to access a file must wait until the scan is completed,
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before being able to use the file. The system ensures that scanning is performed
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only when required, not on every access.</p>
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</li>
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<li>Mass or manually activated scanning <p>You can
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use this option if you want to scan multiple items at the same time. In this
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instance, you can set the scan to occur when your server is off, such as during
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the weekend. This has very little impact on accessing files during your normal
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day-to-day activities. The scan is done offline. Therefore, it can reduce
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runtime scan overhead for files that do not change after the mass scan is
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completed. Because re-scans are not required when such files are accessed
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again.</p>
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</li>
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</ol>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaaxscan.htm" title="With iSeries, you can scan integrated file system objects.">Scanning support</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzaaxscansval.htm" title="Related to this scan support are two system values. You can use these two system values to establish the scanning environment you want for your server.">Related system values</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../apis/ifsopenexit.htm">QIBM_QP0L_SCAN_OPEN</a></div>
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<div><a href="../apis/ifscloseexit.htm">QIBM_QP0L_SCAN_CLOSE</a></div>
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</div>
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</div>
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</body>
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</html> |