Network Monitoring Tools Nagios and Spiceworks Mit Dave 26 March 2014 Introduction What are Network Monitoring Tools? System & Service monitoring Resource measurement/monitoring Performance monitoring Statistics & Accounting/Metering Fault Management (Intrusion Detection) Change management and configuration monitoring Why Nagios and Spiceworks? Nagios Possibly the most used open source network monitoring software. It is an agent based tool. A key measurement tool for actively monitoring availability of devices and services. Has a web interface. Uses CGIs written in C for faster response and scalability. Can support thousands of devices and services. Nagios-Installation Requirements : LAMP Bundle Installation – Server sudo apt-get install nagios3 Files are installed here: • • • • • • /etc/nagios3 /etc/nagios3/conf.d /etc/nagios-plugins/conf /usr/share/nagios3/htdocs/images/logos /usr/sbin/nagios3 /usr/sbin/nagios3stats Nagios web interface is here: • http://localhost/nagios3/ Configuring- Host Various agents are available: • NSClient++ • NRPE • NRDP Adding Windows host using NSClient++: • Install NSClient++ on host machine • Go to the installation directory and open the nsclient.ini • Look for these lines and add them if they’re missing: allowed hosts = password = port = 12489 • Restart the NSClient++ service: Start > Administrative tools > Services Adding Linux host using NRPE: 1. Download • nagios-plugins-1.4.13.tar.gz • nrpe-2.12.tar.gz 2. Create Nagios Account • useradd nagios • passwd nagios 3. Install Nagios Plugin • tar xvfz nagios-plugins-1.4.13.tar.gz • cd nagios-plugins-1.4.13 • export LDFLAGS=-ldl • ./configure • Make • make install • chown nagios.nagios /usr/local/nagios • chown -R nagios.nagios /usr/local/nagios/libexec/ 4. • • • • • • • • • 5. • • • Install NRPE cd /home/downloads tar xvfz nrpe-2.12.tar.gz cd nrpe-2.12 ./configure make all make install-plugin make install-daemon make install-daemon-config make install-xinetd Setup NRPE to run as daemon Modify the /etc/xinetd.d/nrpe only_from = 127.0.0.1 192.168.1.2 Modify the /etc/services and add the following at the end of the file. nrpe 5666/tcp # NRPEStart the service service xinetd restart Configuring- Server 1. • • • • • Install NRPE Plugin: tar xvfz nrpe-2.12.tar.gz cd nrpe-2.1.2 ./configure make all make install-plugin 2. Make Host Configuration file 3. Make Service Configuration file Other Configuration Files Located in /etc/nagios3/ Important files: • cgi.cfg controls the Web Interface options security • commands.cfg commands that Nagios uses to notify • nagios.cfg main Nagios configuration file • conf.d/* the core of the config files • Under conf.d/*, files “xxxx_nagios2.cfg”: • Contacts users and groups • generic-host “template” host (default) • generic-service “template” service • hostgroups host group definitions • services which services to check • timeperiods when to check and notify Spiceworks • • • • • • • FREE! Agentless Full Inventory of Hardware & Software Track To-Do’s & User Requests Collaborate With a Community of IT Pros IT Pros who have admin rights on their network Organizations with less than 1000 devices on their network. It will work with more, but it won’t be as fast. • Discovering Windows, OS X, Linux and Unix (but must run from a PC). Installation For Server Side • Go to www.spiceworks.com-Download-Install For host Side • Configure firewall • For windows machines should allow “Windows Management Instrumentation ” (WMI) services. • Administrator Credentials are required to access the systems. Operations • • • • Scanning the network Inspecting the Inventory Monitoring Options. Ticketing. Nagios Vs Spiceworks Nagios Pros: • Open source and very flexible. • Large ecosystem of tools and custom monitors built up around nagios. • All configuration is text files, so it is easy to keep this in version control and generate new configs from other tools. Cons: • Default interface is clunky. • Can be a steep learning curve if you haven't worked with it before. • Adding devices or services requires reloading the config or restarting the service. • Would like for this to be more dynamic. • It seems that most of the new development is going towards Nagios XI(paid enterprise version) rather than the opensource nagios. Spiceworks Pros: This is a great service desk product for SMB's. It's free and easy to get going so it is perfect for companies that haven't got anything in place to handle inventory and helpdesk. It is supported by a strong community of users that give you a built-in expert network and IT knowledgebase. Cons: I think its monitoring tools could use some improvement. Clearly it wasn't designed as a monitoring application from the start and it still seems a bit weak compared to Nagios.
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