Trojan scan is a simple shell script that allows for simple but relatively effective checking for trojans, rootkits and other malware that may be using your server and network for unwanted (and possibly illegal) purposes. It works by listing all processes that use the Internet with the lsof command (using -Pni flags). This list is then transformed into signatures in the form of process_name:port_number:user. These signatures then are matched against the allowed process defined in the configuration. If any signatures of running processes are found that do not match the allowed signatures, an email report is sent including ps, ls, and optional lsof output.
CaiCai is a network and services monitoring system. It performs tests for ping, DHCP, POP3, SMTP, FTP, etc. It does not require additional software installed on the remote side. It is fully configurable. It provides instant reports (via an HTML page), logs, statistics, and sound alarms.
StoCS is a script to control free space on disk and to maintain free space at a configurable level. It works with three thresholds: WARN(do a configurable action), FDEL (deletion limit), and LOWL (dimension to reach after deletion). The threshold unit can be: total number of files and/or subdirectories; total dimension of controlled folders; percentage of free space on disk; or maximum age of files and/or subdirectories.
Bartlby is a network and system monitor, completely written in C, to provide a scalable framework with the ability to monitor networks of various sizes. It consists of a core daemon, several plugins, and a Web GUI (PHP extension). The core daemon checks (over active/passive TCP) services/hosts and notifies users in case of critical service conditions (mail, SMS, ICQ, and custom triggers are supported). Bartlby provides an open plugin interface to give every administrator an easy to use option to extend the plugin base, and a fully customizable GUI (written in PHP using a C extension). Nearby everything can be controlled via an XML interface.
Qubit (Qmail Ultimate Backend Integration Tool) is a fully Web-based qmail server configuration and administration suite. It is based on the qmailrules qmail server installation style. It has the same features as other similar tools (like vqadmin and qmailadmin), and it also gives you full control to administer your server with all sorts of features and applications.
upnp2mrtg is a simple add-on for the MRTG (Multi Router Traffic Grapher). It can be used to monitor incoming and outgoing bytes of the external interface of the FritzBox DSL router. upnp2mrtg is a command line tool to gather statistics from an upnp enabled FritzBox DSL router. It is a lightweight shell-script for use with MRTG, so no underlying external software (with the exception of netcat) or libraries are required. Using bash-networking instead of netcat is also supported.
htb-stats.sh is a useful script for htb class summarization. It's designed to allow simple, non-root usage, e.g. "./htb-stats.sh eth0". If an htb.init, tcng.init, or htb-gen configuration is found, it will label traffic output with information taken from respective configuration files.