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Support and Service > F-PROT Antivirus for Windows > Frequently Asked Questions > The Command-Line Scanner (fpcmd.exe) does not detect suspicious files in archives nested within other archives.

Summary
Product: F-PROT Antivirus for Windows
Version: 3

Please note that version 6 of F-PROT Antivirus for Windows has been released. We recommend that all Home, Corporate and Mail Server users of version 3 of F-PROT Antivirus for Windows upgrade their program to the newest version as soon as possible.


The Command-Line Scanner (fpcmd.exe) does not detect suspicious files in archives nested within other archives.

The /ARCHIVE switch's default setting is to scan and detects infections up to five levels of archives and beyond that will not be scanned. This is to prevent the scanner from taking unacceptably long time to scan so-called "zip bombs" or "archive bombs", some of which use over 40 levels of archives or include tens of thousands of archives nested within each other.

However, you can easily alter the /ARCHIVE switch's default setting by changing /ARCHIVE=n. Where "n" is the desired levels depth and the supported range is between 1 and 99.

For example:
/ARCHIVE=2
/ARCHIVE=3

The /SERVER switch is a new addition that puts F-PROT Antivirus into mail server mode. Thereby heuristics are enabled that are only enabled by default in mail server versions and fpcmd.exe (Windows command-line version of F-PROT Antivirus). As a result the heuristics will, for example, alert the user on finding suspicious executable files within encrypted archives that are embedded within archives.

Currently F-PROT Antivirus does not support disinfection or removal of infected files within archives. Mailboxes are considered to be archives and therefore F-PROT Antivirus is not able to remove infected attachments. For detailed instructions on how to disinfect infected archives, please see How to disinfect infected archives?.

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