trisul (www.net-security.org/software.php?id=707) Trisul is a network metering and forensics tool. You can install Trisul on any Linux box and have it look at network traffic in real time or via capture files. It meters the traffic (by host, by protocol, by subnet, etc) and stores the results in a SQL database.
SniffPass (www.net-security.org/software.php?id=716) SniffPass is a network protocol sniffer that automatically captures password that are transmitted via POP3, IMAP4, SMTP, FTP, and HTTP protocol. It can be used to recover forgotten passwords that are hidden behind asterisks or otherwise inaccessible. SniffPass can use RAW sockets on XP/2000 and requires WinPcap for other Windows operating systems.
fwknop (www.net-security.org/software.php?id=695) fwknop implements an authorization scheme called Single Packet Authorization that requires only a single encrypted packet to communicate various pieces of information, including desired access through an iptables or ipfw firewall policy and/or specific commands to execute on the target system.
SimpleAuthority (www.net-security.org/software.php?id=680) SimpleAuthority is a free Certification Authority (CA). It generates keys and certificates that provide cryptographic digital identities for a community of people and/or computer servers. These identities are designed to be used in other applications for security purposes within this community.
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