59 Open Source Tools That Can Replace Popular Security Software

It's been about a year since we last updated our list of open source tools that can replace popular security software. This year's list includes many old favorites, but we also found some that we had previously overlooked.

In addition, we added a new category -- data loss prevention apps. With all the attention generated by the WikiLeaks scandal, more companies are investing in this type of software, and we found a couple of good open source options.

Thanks to Datamation readers for their past suggestions of great open source security apps. Feel free to suggest more in the comments section below.

Anti-Spam

1. ASSP Replaces: Barracuda Spam and Virus Firewall, SpamHero, Abaca Email Protection Gateway

ASSP (short for "Anti-Spam SMTP Proxy") humbly calls itself "the absolute best SPAM fighting weapon that the world has ever known!" It works with most SMTP servers to stop spam and scan for viruses (using ClamAV). Operating System: OS Independent.

2. MailScanner Replaces: Barracuda Spam and Virus Firewall, SpamHero, Abaca Email Protection Gateway

Used by more than 100,000 sites, MailScanner leverages Apache's SpamAssassin project and ClamAV to provide anti-spam and anti-virus capabilities. It's designed to sit on corporate mail gateways or ISP servers to protect end users from threats. Operating System: OS Independent.

3. SpamAssassin Replaces: Barracuda Spam and Virus Firewall, SpamHero, Abaca Email Protection Gateway

This Apache project declares itself "the powerful #1 open-source spam filter." It uses a variety of different techniques, including header and text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases, to filter out bulk e-mail at the mail server level. Operating System: primarily Linux and OS X, although Windows versions are available.

4. SpamBayes Replaces: Barracuda Spam and Virus Firewall, SpamHero, Abaca Email Protection Gateway

This group of tools uses Bayesian filters to identify spam based on keywords contained in the messages. It includes an Outlook plug-in for Windows users as well as a number of different versions that work for other e-mail clients and operating systems. Operating System: OS Independent.

Anti-Virus/Anti-Malware

5. ClamAV Replaces Avast! Linux Edition, VirusScan Enterprise for Linux

Undoubtedly the most widely used open-source anti-virus solution, ClamAV quickly and effectively blocks Trojans, viruses, and other kinds malware. The site now also offers paid Windows software called "Immunet," which is powered by the same engine. Operating System: Linux.

Read more: Datamation

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