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Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is software that monitors numerous parameters of a network and the health and integrity of servers. Zabbix uses a flexible notification mechanism that allows users to configure e-mail based alerts for virtually any event. This allows a fast reaction to server problems. Zabbix offers excellent reporting and data visualisation features based on the stored data. This makes Zabbix ideal for capacity planning.

Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database. The frontend is completely PHP driven. Along with being able to maintain Graphs, Data Sources, and Round Robin Archives in a database, cacti handles the data gathering. There is also SNMP support for those used to creating traffic graphs with MRTG.

Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. The monitoring daemon runs intermittent checks on hosts and services you specify using external "plugins" which return status information to Nagios. When problems are encountered, the daemon can send notifications out to administrative contacts in a variety of different ways (email, instant message, SMS, etc.). Current status information, historical logs, and reports can all be accessed via a web browser.

RAToolSet is a suite of policy analysis tools. It is implemented in C++ on a UNIX platform. It has been ported successfully to many platforms including Sun Sparc stations running SunOS 4.1.3 or Solaris, FreeBSD, DEC Alphas running OSF/1, and BSDI. It contains the following programs: rtconfig routing policy analyzer and router configuration tool peval a low-level policy evaluation tool rpslcheck syntax checks the aut-num policy for an AS

Argus is a generic IP network transaction auditing tool that has been used by thousands of sites to perform a number of powerful network management tasks that are currently not possible using commercial network management tools. Argus runs as an application level daemon, promiscuously reading network datagrams from a specified interface, and generates network traffic audit records for the network activity that it encounters. It is the way that Argus categorizes and reports on network activity that makes this tool unique and powerful.

Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. The monitoring daemon runs intermittent checks on hosts and services you specify using external "plugins" which return status information to Nagios. When problems are encountered, the daemon can send notifications out to administrative contacts in a variety of different ways (email, instant message, SMS, etc.). Current status information, historical logs, and reports can all be accessed via a web browser.

Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is software that monitors numerous parameters of a network and the health and integrity of servers. Zabbix uses a flexible notification mechanism that allows users to configure e-mail based alerts for virtually any event. This allows a fast reaction to server problems. Zabbix offers excellent reporting and data visualisation features based on the stored data. This makes Zabbix ideal for capacity planning.

Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is software that monitors numerous parameters of a network and the health and integrity of servers. Zabbix uses a flexible notification mechanism that allows users to configure e-mail based alerts for virtually any event. This allows a fast reaction to server problems. Zabbix offers excellent reporting and data visualisation features based on the stored data. This makes Zabbix ideal for capacity planning.

MLDonkey is an OCAML/GTK client for a number of peer-to-peer networks. It is separated into a core with telnet and web interfaces, and a GTK GUI. The following protocols are supported: - eDonkey (http://www.edonkey2000.com/) - Overnet (http://www.overnet.com/) - Bittorrent (http://www.bittorrent.com/) - Gnutella (http://www.gnutella.org/) - Gnutella2 (http://www.shareaza.com/) - Fasttrack (http://en.wikipedia.org/wiki/Fasttrack) - FileTP [http/ftp/ssh] (http://mldonkey.sourceforge.net/FileTP) - Kademlia (http://en.wikipedia.org/wiki/Kad_Network)

Arping is a util to find out if a specific IP address on the LAN is 'taken' and what MAC address owns it. Sure, you *could* just use 'ping' to find out if it's taken and even if the computer blocks ping (and everything else) you still get an entry in your arp cache. But what if you aren't on a routable net? Then you're screwed. Or you use arping. Roman Shterenzon <roman@xpert.com>