Versioner is a graphical utility for Windows tool that traverses directories gathering extended file properties and information, including md5 checksum. This is useful for checking for intrusions, or finding out exactly what has changed since it was run last, or finding differences between hosts. Versioner will output its information in a human readable text format as well as a comma seperated version that can be imported directly into MS-Excel or MS-Access. Screenshot available here.
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The Anomy mail sanitizer is a filter designed to block email-based attacks such as trojans and viruses. It reads an RFC822 or MIME message and removes or renames attachments, truncate unusually long MIME header fields and sanitizes HTML by disabling Javascript and Java. It uses a single-pass pure Perl MIME parser, which can make it both more efficient and more precise than other similar programs and has built-in support for third-party virus scanners.
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Nessus is a free, up-to-date, and full featured remote security scanner for Linux, BSD, Solaris and some other systems. It is multithreaded, plugin-based, has a nice GTK interface, and currently performs over 530 remote security checks. It has powerful reporting capabilities (HTML, LaTeX, ASCII text) and not only points out problems, but suggests a solution for each of them. Windows version available here.
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This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.
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Rc.firewall is an ipchains based firewall setup script with easy support for many network services, masquerading, port forwarding, and IP accounting. Protections include spoofing, stuffed routing / masqerading, DoS, smurf attacks, outgoing port scans, and much more.
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