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Clam AntiVirus
Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates. The core of the package is an anti-virus engine available in a form of shared library.
It has a command line interface for scanning files, updating the virus definitions, and a daemon for faster scanning needed on high performance systems. Unlike most antivirus products, ClamAV requires no yearly subscription fee, and is completely free with source code to anyone who wishes to use it. Because it is released under the GPL v2 license, you must follow all license requirements if you modify the ClamAV source code, or use it in your own projects.
Here is a list of the main features:
* command-line scanner
* fast, multi-threaded daemon with support for on-access scanning
* milter interface for sendmail
* advanced database updater with support for scripted updates and digital signatures
* virus scanner C library
* on-access scanning (Linux® and FreeBSD®)
* virus database updated multiple times per day (see home page for total number of signatures)
* built-in support for various archive formats, including Zip, RAR, Tar, Gzip, Bzip2, OLE2, Cabinet, CHM, BinHex, SIS and others
* built-in support for almost all mail file formats
* built-in support for ELF executables and Portable Executable files compressed with UPX, FSG, Petite, NsPack, wwpack32, MEW, Upack and obfuscated with SUE, Y0da Cryptor and others
* built-in support for popular document formats including MS Office and MacOffice files, HTML, RTF and PDF
Download:- Clam AntiVirus