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An open source log analyzer. Along with the usual web statistics of pages, hits, also shows busiest hours, a search engine breakout with keywords, robots, and broken links. Works with IIS or Apache using a Perl script, GNU GPL.
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A log analyser for MTA logfiles (for example sendmail). (C++) [GNU/Linux, Unix]
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Parses the logfiles of a wide variety of Web proxy servers and generates reports. (Perl) [Linux, Unix]
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Resolves IP numbers to hostnames like in Apache, Squid, or other logfiles. It is able to cache lookups in a file. (Perl)
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A general purpose monitoring engine for use by home users and system administrators (Perl) [Unix, Win32]
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Emails a report of all packets that have been logged by the kernel's ipchains or iptables packet filtering subsystems. (Perl) [GNU/Linux]
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Web page checker based on regular expressions. (Java) [Linux, Windows]
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A tool to measure the maximum TCP bandwidth between two points on the internet. (C++) [Many platforms]
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A network interface traffic statistics reporting and graphing tool. (PHP)
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An active network monitor with plugins to monitor several types of services, e.g. ftp, http, tcp port, disk space. (C) [GNU/Linux, Unix]
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A network load monitoring applet for GNOME. (C) [GNU/Linux, FreeBSD]
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Ngrep is a pcap-aware tool that will allow you to specify extended regular expressions to match against data part of packets on the network. (C) [GNU/Linux, BSD, Windows 95/98/2000]
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A tool that shows the network usage. It can be used interactively, or in web mode. (C) [GNU/Linux, Unix, Windows]
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Allows the monitoring of heterogeneous systems using multi-platform agents distributed over a network. Includes news, downloads and a development weblog.
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Assists in visualizing a Data Center's computer rack layouts by creating a web page with HTML tables to show a frontview of the racks. Included are brief commandline and CGI scripts to demonstrate its implementation. (Perl) [Linux]
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RUE is a monitoring/profiling tool for any Java based server. (Java)
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Software for application and network monitoring - logging, monitoring, capacity planning, availability and performance measurement, and helpdesk information. (C, PHP) [POSIX]
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Perl script which parses for attacks a squid log file. Allows to run commands or automatically notify the attacker's ISP upon trigger.
