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jailed implements a nonprivileged jailroot. It allows an environment to be specified, does std(in/out/err) redirection, and can restart a failed child.
Semi's Spam Milter (sspamm) is a spam filter for Sendmail that utilizes spambayes, heurestic spam filtering, and virus scanning (BitDefender, not included).
Qryptix consists of a PAM object and utilities for session- and key-management for encrypted home directories using the International Kernel (CryptoAPI) patches for Linux. It simplifies login/logout, mounting/unmounting, and key generation and changing.
Socks via HTTP
Socks via HTTP is a program to tunnel socks via HTTP. It is entirely written in Java.
The kopkop daemon listens for encrypted, signed, and fully random-looking command packets. Only the fields essential for the packets' travel trough the Internet are filled with "sane" data. Upon reception and after a preset timeout, the daemon executes user-defined commands. This can be used to open firewalls, so you can reduce your system's attack surface by hiding certain services until you need to use them. The kopkop client creates and sends the encrypted packets, and is included. The communication is strictly unidirectional and quite minimal between the client and the server. Replay attacks are forestalled by storing and comparing monotonically increasing packet IDs on both sides.
DSPAM is a server-side anti-spam agent for UNIX email servers. It masquerades as the email server's local delivery agent and filters/learns SPAM using a Bayesian statistical approach which provides an administratively maintenance-free, self-learning Anti-Spam service. Each email is broken down into its most interesting tokens, each assigned a spam probability. All probabilities are then combined to produce a statistical probability of spam. This approach, applied to a mature corpus of email, has the potential to yield a 99.5% success rate with only 0.03% chance of false positives.
GNOME Password Manager
GPass is a simple GNOME application that lets you manage a collection of passwords. The password collection is stored in an encrypted file, protected by a master-password.
Qmail SStats is a small script that generates daily, weekly, and monthly statistics of spam and clean mail that has passed through a mail server. This script is useful if you are using qmail combined with qmailscanner and spamassassin.
PHP Service Monitor
PHP Service Monitor is a basic server/service monitor where you specify what server and what services you want to monitor for each specific server. It will monitor the services, and notify you via email and GUI if the service is down.
Jailkit is a set of utilities to allow quick creation of limited user accounts. It contains a safe logging daemon, shells that can restrict users and utilities for easy setup.
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