Installation Guide - Eset
Installation Guide - Eset
Installation Guide - Eset
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HTTP: Active & Passive modes<br />
Administration <strong>Installation</strong> <strong>Guide</strong><br />
The download popup window is shown only for applications set to Active<br />
mode (Higher efficiency) in the HTTP scanner compatibility (default).<br />
With IMON in Passive mode, portions of a downloaded file are<br />
continuously passed on to the target application whilst IMON stores a<br />
temporary copy of each of the fragments. When the last fragment is<br />
detected, the whole file is scanned for viruses. If an infiltration is detected,<br />
a warning window appears and the connection with the particular server<br />
is terminated. A disadvantage of that is that the already downloaded<br />
portion of the file may already contain a fundamental portion of a malicious<br />
code. What’s more, if the application repeatedly attempts to download an<br />
infected file, it may use the already downloaded data and request only the<br />
rest of the file. In this case, IMON may not find anything suspicious in the<br />
remaining portion.<br />
In Active mode (default), IMON first downloads and scans the whole file<br />
and then passes it on to the target application. This procedure is safer<br />
because in the case of an infiltration, the application does not receive<br />
any portion of the downloaded file. A disadvantage is that the application<br />
receives all the data at once, therefore it cannot show the download status<br />
properly. Therefore, if the download lasts for more than 55 seconds (default,<br />
but can be altered), a small window showing the download progress pops<br />
up. Active mode is not suitable for certain types of data which requires a<br />
continual data flow (e.g. multimedia, streaming video/audio).<br />
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