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"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."

fswatch: - is a utility to guard changes in a file system. - is composed of three simple programs: fswbuild, fswcmp, fswshow. fswbuild builds a file system information database. fswcmp compares two database files and returns what changes a in file system have been introduced. fswshow shows contents of database file. a file information database is platform independent. - can collect the following information about files (and directories): inode, links, uid, gid, mode, size, flags, ctime, checksum (sha1) ; and can show which files were added, deleted or changed. - is one of many similar utilities. the main difference is the configuration. you can define different settings for every directory in a directory tree. moreover, it is very small and fast.

FTimes is a system baselining and evidence collection tool. Its primary purpose is to gather and/or develop topographical information and attributes about specified directories and files in a manner conducive to intrusion and forensic analysis. It was designed to support the following initiatives: content integrity monitoring, incident response, intrusion analysis, and computer forensics.

fwanalog is a shell script that parses and summarizes firewall logfiles. It uses the excellent log analysis program Analog to create its reports.

Cardpeek is a graphical tool to read the contents of ISO 7816 smart cards. It features a GTK+ v3.0 GUI to represent card data is a tree view, and is extensible with a scripting language (Lua). The goal of the project is to allow smart card owners to be better informed about what type of personal information is stored in these devices.

Fwipe is a secure file erasing program. fwipe0, which actually erases your files, is immune to filenames containing spaces, carriage returns, dashes, or any other special characters. You can use it in place of rm in cron jobs, together with "find ... -print0". The output of fwipe0 is specially designed to be parsed easily by machine, so it can be embedded in other applications which need secure file erasure.

fwknop, "FireWall KNock OPerator", implements Single Packet Authorization (SPA).

This is a simple encryption tool to work with home-grown encryption algorithms. It can run as either a GUI, a command-line application, or a network proxy.

Simple commandline wrapper around gpg that makes it store its passphrase in gnome-keyring. It is a direct competitor to (the unmaintained) quintuple-agent.

gnome-keyring-sharp is a fully managed implementation of libgnome-keyring. When the gnome-keyring-daemon is running, you can use this to retrieve/store confidential information such as passwords, notes or network services user information.