August 2012 Meeting Details

The meeting of the “Indian Libre User Group” was successfully held on August 26th 2012

Date: 26-08-2012

Time: 2:00pm – 5.30pm
Venue: Internet Club, IInd Floor,
AMI Trust Building,Broadway Enclave,
Broadway, Ernakulam

2.30pm – 2.45pm

Customary Self Introduction.
People shared their experience with Free Software

2.45pm – 4.30pm – Session by JayJacob

Nagios is a popular open source computer system monitor, network monitoring and infrastructure monitoring software application. Nagios offers monitoring and alerting for servers, switches, applications, and services. It watches hosts and services. It alerts users when things go wrong and alerts them again when those wrong things get better/resolved.
Nagios, originally created under the name NetSaint, was written and is currently maintained by Ethan Galstad, along with a group of developers actively maintaining both official and unofficial plugins. N.A.G.I.O.S. is a recursive acronym: “Nagios Ain’t Gonna Insist On Sainthood”,”Sainthood” being a reference to the original name NetSaint, which was changed in response to a legal challenge by owners of a similar trademark.”Agios” is also a transliteration of the Greek word άγιος which means “saint”.
Nagios was originally designed to run under Linux, but also runs well on other Unix variants. It is free software, licensed under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.
In a 2006 survey among the nmap-hackers mailing list, 3243 people responded when asked for their favorite network security tools. Nagios came in 67th overall and 5th among traffic monitoring tools. Nmap itself was excluded from the list.


Nagios is Open Source Software licensed under the GNU GPL V2.
– Monitoring of network services (SMTP, POP3, HTTP, NNTP, ICMP, SNMP, FTP, SSH)
– Monitoring of host resources (processor load, disk usage, system logs) on a majority of network operating systems, including Microsoft Windows with the NSClient++ plugin or Check MK.
– Monitoring of anything else like probes which have the ability to send collected data via a network to specifically written plugins
– Monitoring via remotely-run scripts via Nagios Remote Plugin Executor
– Remote monitoring supported through SSH or SSL encrypted tunnels.
– Simple plugin design that allows users to easily develop their own service checks depending on needs
– Plugins available for graphing of data
– Parallelized service checks available
– Ability to define network host hierarchy using “parent” hosts, allowing detection of and distinction between hosts that are down and those that are unreachable
– Contact notifications when service or host problems occur and get resolved
– Ability to define event handlers to be run during service/host events for proactive problem resolution
– Automatic log file rotation
– Support for implementing redundant monitoring hosts
– Optional web-interface for viewing current network status,notifications, problem history,log files,etc.
– Data storage is done in text files rather than database

4.30pm – 4.45pm

Tea break

Concluding Session

People were requested to handle small technical discussions for the next meeting.

Thanks to all the attendees for coming and they are requested to put their feedback on the mailing list so that we can improve future meetings

The next user meet is on 23rd September 2012

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