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Brian is a simulator for spiking neural networks available on almost all platforms. The motivation for this project is that a simulator should not only save the time of processors, but also the time of scientists. Brian is easy to learn and use, highly flexible and easily extensible. The Brian package itself and simulations using it are all written in the Python programming language, which is an easy, concise and highly developed language with many advanced features and development tools, excellent documentation and a large community of users providing support and extension packages.

Open Babel is a project designed to pick up where Babel left off, as a cross-platform program and library designed to interconvert between many file formats used in molecular modeling and computational chemistry. Features currently include: * A huge variety of common chemical file formats * Recognition of file type based on filename extension * SMARTS matcher * Flexible atom typer * Gasteiger partial charge calculation * Hydrogen addition and deletion * Automatic feature perception (rings, hybridization, aromaticity) * Multiple conformer storage within molecules * Command line interface development class * Bitvector class * Open-source/Free Software under the GNU General Public License * Cross platform (Windows, Linux, Mac OS X, SGI, Solaris, Dreamcast...)

Firewalk is a network auditing tool that attempts to determine what transport protocols a given gateway will pass. Firewalk works by sending out TCP or UDP packets with a TTL one greater than the targeted gateway. If the gateway allows the traffic, it will forward the packets to the next hop where they will expire and elicit an ICMP_TIME_EXCEEDED message. If the gateway host does not allow the traffic, it will likely drop the packets on the floor and we will see no response.

"Fragroute intercepts, modifies, and rewrites egress traffic destined for a specified host, implementing most of the attacks described in the Secure Networks "Insertion, Evasion, and Denial of Service: Eluding Network Intrusion Detection" paper of January 1998. It features a simple ruleset language to delay, duplicate, drop, fragment, overlap, print, reorder, segment, source-route, or otherwise monkey with all outbound packets destined for a target host, with minimal support for randomized or probabilistic behaviour. This tool was written in good faith to aid in the testing of network intrusion detection systems, firewalls, and basic TCP/IP stack behaviour. Please do not abuse this software."

OpenBSM is an open source implementation of Sun's Basic Security Module (BSM) Audit API and file format. BSM, the de facto industry standard for Audit, describes a set of system call and library interfaces for managing audit records, as well as a token stream file format that permits extensible and generalized audit trail processing. OpenBSM extends the BSM API and file format in a number of ways to support features present in the Mac OS X and FreeBSD operating systems, such as Mach task interfaces, sendfile(), and Linux system calls present in the FreeBSD Linux emulation layer.

OpenBSM is an open source implementation of Sun's Basic Security Module (BSM) Audit API and file format. BSM, the de facto industry standard for Audit, describes a set of system call and library interfaces for managing audit records, as well as a token stream file format that permits extensible and generalized audit trail processing. OpenBSM extends the BSM API and file format in a number of ways to support features present in the Mac OS X and FreeBSD operating systems, such as Mach task interfaces, sendfile(), and Linux system calls present in the FreeBSD Linux emulation layer.

This is the base class for a system of objects that encapsulate passphrases. An object of this type is a passphrase recogniser: its job is to recognise whether an offered passphrase is the right one. For security, such passphrase recognisers usually do not themselves know the passphrase they are looking for; they can merely recognise it when they see it. There are many schemes in use to achieve this effect, and the intent of this class is to provide a consistent interface to them all, hiding the details. The CPAN package Authen::Passphrase contains implementations of several specific passphrase schemes in addition to the base class.

Net::Daemon is an abstract base class for implementing portable server applications in a very simple way. The module is designed for Perl 5.005 and threads, but can work with fork() and Perl 5.004. The Net::Daemon class offers methods for the most common tasks a daemon needs: Starting up, logging, accepting clients, authorization, restricting its own environment for security and doing the true work. You only have to override those methods that aren't appropriate for you, but typically inheriting will safe you a lot of work anyways.

Binwalk is a tool for searching a given binary image for embedded files and executable code. Specifically, it is designed for identifying files and code embedded inside of firmware images. Binwalk uses the libmagic library, so it is compatible with magic signatures created for the Unix file utility. Binwalk also includes a custom magic signature file which contains improved signatures for files that are commonly found in firmware images such as compressed/archived files, firmware headers, Linux kernels, bootloaders, filesystems, etc. More details are available at:

This package provides an interface to the cracklib (libcrack) libraries that come standard on most Unix-like distributions. This allows you to check passwords against dictionaries of words to ensure some minimal level of password security. From the cracklib README CrackLib makes literally hundreds of tests to determine whether you've chosen a bad password. * It tries to generate words from your username and gecos entry to tries to match them against what you've chosen. * It checks for simplistic patterns. * It then tries to reverse-engineer your password into a dictionary word, and searches for it in your dictionary. - after all that, it's PROBABLY a safe(-ish) password. 8-)