Free security monitor software for linux

The Network Security Monitor Daemon is a lightweight network security monitor for TCP/IP LANs. It will capture certain network events and record them in a relational database. The recorded data is available for analysis through a CGI-based interface.
You can run test version with ./Monitord, just to see how it works. Production version should be run in background, v.g. with nohup ./monitord &. Both versions will accept a device name as a parameter (default: eth0). You can send them SIGHUP at any time to print some stats. If you send SIGTERM, SIGQUIT or SIGINT, all threads will end gracefully.
Enhancements:
- Linux Kernel with "packet sockets" and "socket filtering" support.
- GNU C Library 2 (glibc2) with LinuxThreads support. (integrated in most recent versions).
- Full MySQL, including headers and libmysqlclient_r.
- GNU C Compiler (gcc).
- GNU Make (make).
- Perl (perl).
- Wget (wget).
Enhancements:
- Added chmod 4755 ... in Makefile
- Root should run make now, but not the daemon ;-)
- The daemon will drop root privileges as soon as possible
- (after creating the raw socket with an attached linux socket
- filter and putting the interface in promiscuous mode)
- No threads run with root privileges so its much safer
- (specially the new server thread which reads remote user input)
- Added stats thread
- To calculate/mantain exponential averages
- Added server thread
- It accepts HTTP requests and serves stats in XML

Server Monitor is a theme which displays the status of your servers. Also you can start / stop them by clicking the names.

You cann add servers by editing the py-file. You may resize theme in the .theme-fille.

Based on vpn by N7DR (http://www.kde-look.org/content/show.php?content=39390).

CrystalMonitor is SuperKaramba theme with:

* Guess distro
In .py file is link to files, where are basic infos about your distro. .py file finds sitably file and only writes out data to CrystalMonitor.

* Kernel monitor
Display your kernel version

* Cpu monitor
Display your procesor name, cpu cache and usage

* Ram, swap monitor
Display how many MB memory has your computer and how many MB of its is in usage

* Hdd monitor
Display Home and Root particions

* TimeMonitor
Day, Date and time monitor

* Procesor temperature and MHz monitor (ACPI)
Its working only if the ACPI and the frequency scaling are enable.

* Network (downstream/upstream) monitor (5.0 and newer)

* 12 themes (4.0 and older)

NAT Monitor is a tool to monitor hosts bandwidth usage in a Linux-NAT network.

A daemon collects data and clients display them (currently a GTK app with graph and a text version). It detects new hosts, saves up to 12 hours of data, and has a nice summary statistic.

compact system monitor is a small and compact system monitor for SuperKaramba.

Credit where credit is due, i think i stole the icons from Borealis? Nice are they not? And the idea from someone else.

The theme can be changed somewhat by editing the theme and comenting out some lines.

Hope you like it! Its my first!

Backup Monitor is an rsync backup front-end with a Web interface, which emails reports with an attached summary or logfile.
Backup Monitors configuration system is simple to use and can back up single servers or entire server farms from a single machine.
Custom email tags can be used to sort responses in your mail reader.
Enhancements:
- This release adds MySQL support for logging, cleans up email notifications, and fixes null additions and a whitespace issue.
- The installer [install.php] fills in most config fields automagically for you.
- Log size rotation is configurable.
- PID check has been updated, and now relies on Unix::PID cleanliness.
- RSYNC STDERR is now redirected for email notifications.

Hard Disk Temperature Monitor is my first superkaramba theme, it uses the package hddtemp, please verify if your system has it installed.

I modify this image(http://www.kde-look.org/content/show.php?content=28748)

And made the Icon, from 2 images from the web.

The entire theme is in spanish, but you can translate to any language.

I really apreciate your comments!

Thank you so much, and greetings from Medellin-Colombia!

Aazmat Monitor is a SuperKaramba system monitoring widget.

It was adapted to meet office theme and added a few new monitors all of them are built into there own theme file so you can place them were you like.