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Monitoring windows Machine using Nagios

By using nagios we can monitor privite services & attributes like

Memory usage
CPU load
Disk usage
Service stats
Running processes etc

Monitoring privite services or attributes of a windows machine requires an agent on it.This agent act as a proxy between the nagios plugin that does the
monitoring and the actual service or attribute of windows machine.Without installing an agent on the windows box,nagios unable to monitor privite services
or attributes.
We are using NSClient++ addon on the windows machine as agent and check_nt plugin communicate with the NSClient++ addon.

Nagios upgradation from Previous Nagios 3.x release

Before upgrading you should have a good backup of existing nagios installation and configuration files.If anything goes wrong,then this will allow you to rollback to your old version.
Nagios upgrading don't even need root access.We can do this as 'nagios' user.

Become nagios user by su or sudo command
su -l nagios

Remove the following old html files that were used by web frontend.The have been replaced by PHP equivalents
rm /usr/local/nagios/share/{main,side,index}.html

sysctl

sysctl is an interface that allows you to make changes to a running linux kernel.With /etc/sysctl.conf,you can configure various linux networking and system setting such as

limit network transmited configuration for ipv4 & ipv6
Turn on exe sheild protection
prevent against the common flood attack
Turn on source IP address verification
prevent a cracker from using a spoofing attack against IP address of the server
Log several types of suspicious packets and redirects

Cact Network graphing Tool -Installation

Cacti is a network graphing tool similar to MRTG.It is a complete front end to RRDtool,it stores all of the necessary information to create graphs and populate them with data in MySql database.The front end is completely PHP driven.

Requirements cacti

MySql server
NET-SNMP server (SNMP is used for network management)
PHP with net-snmp module
Web server

Before going to cacti installation,the required software should be installed and configured
Configuring MySql server
Set root password
   mysqladmin -u root password NEWPASS
create 'cacti' MySql database
   mysql -u root -p -e 'create database cacti'
Create 'cacti' user with some pass
   mysql -u root -p
    mysql> GRANT ALL ON cacti* TO cacti@localhost IDENTIFIED BY 'SOMEPASS';
   mysql> FLUSH privileges;

Setting up WebDAV with Apache webserver

WebDAV stands for web based Distributed Authoring and Versioning.And it is a set of extension to the http protocol that allows users to directly edit files on the apache server so that they do not need to be downloaded/uploaded via FTP.
Enabling webDAV on apache webserver includes the following steps