...This method of authorization is based around a default-drop packet filter (fwknop supports iptables and firewalld on Linux, ipfw on FreeBSD and Mac OS X, and PF on OpenBSD) and libpcap. SPA is essentially next-generation port knocking (more on this below). The design decisions that guide the development of fwknop can be found in the blog post "Single Packet Authorization: The fwknop Approach".
Generate a set of random passphrases for you to choose from.
...The passphrase-generator defaults to only 3 words instead of the 4 suggested by XKCD, but uses a larger dictionary found in many unix like systems at /usr/share/dict/words. It also provides estimates for the entropy of the generated passphrases. The randomization is based on /dev/urandom and SHA1.
See http://xkcd.com/936/ for an entertaining take on passwords vs. passphrases.
See my post in stackoverflow for links to other solutions and discussions on passphrases vs passwords: http://stackoverflow.com/a/12646320/1148030
Perl Password Generator using LINUX /dev/urandom, randomized by time signature and hash final masking. Usage: /usr/bin/perl mkpw-hash-alpha.pl [--hash=MD5/SHA1/SHA256/SHA512] [--length=integer<17] [--cycles=integer=1...3]
Reaver is a network vulnerability scanner built on top of Nessus with an easy to use "web front-end" and reporting system. Reaver will aid administrators in identifying, cataloguing and remediation of security vulnerability...DEV -missing web interface
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SrvReport is a simple and featurefull server monitoring and reporting
system. It will send every day a mail with the latest
state of the server including traffic (via /proc/net/dev and/or iptables), cpu, mail, http, ftp reports
and other logs.
Ikedectypt is a perl script to decrypt IKEv1 packets in libpcap formatted trace file.
You can use Ethereal(http://www.ethereal.com) to analyze decrypted trace.
Key information(first initialization vector, skeyid_e) is needed to be supplied by user.
The Entropy Gathering Daemon is a portable perl script which provides a source of randomness on systems that lack an in-kernel /dev/random. GnuPG, OpenSSH, and the OpenSSL toolkit can use EGD to seed their random number generators.