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The mobile access can be tailored according to specific usage, and an offline client synchronization feature ensures the data is always up to date. Zenoss Export Monitoring Templates' title='Zenoss Export Monitoring Templates' />How to install and configure Nagios on Linux. Nagios is one of the most powerful network monitoring systems, which is widely used in the industry. It can actively monitor any network, and generate audioemail warnings and alerts when any problem is detected. The check types and alert timers are fully customizable. Another incredible capability of Nagios is that it can monitor both hosts and services e. IP addresses and TCPUDP port numbers. To explain a little, let us assume that there is a web server that we want to monitor. Open source software is booming here we round up over 480 open source applications for you to use or build upon. Feel free to add more apps in the comments. Review of SugarCRM Software system overview, features, price and cost information. Get free demos and compare to similar programs. We know how administrators love free tools that make their life easier so here are 20 of the best free tools for monitoring devices, services, ports or. Nagios is one of the most powerful network monitoring systems, which is widely used in the industry. It can actively monitor any network, and generate audioemail. Scalability and Performance Monitoring Testing Analyzing on Microsoft Windows 2000 Reference StepbyStep Instructions Tips Tricks. No more missed important software updates UpdateStar 11 lets you stay up to date and secure with the software on your computer. Nagios can check whether the server is online by running ping on the IPname of the server as well as it can be set up to provide warnings in case the round trip time RTT to the server increases. Further, Nagios can also check whether TCP port 8. ApacheIIS is not responding. There are also 3rd party monitoring tools that are based on Nagios, such as Centreon, FAN, op. Monitor, which supplement standalone Nagios engine in terms of interface, automation, and technical support. This tutorial explains how to install and configure Nagios on Linux. Install Nagios on Debian or Ubuntu. On a Debian based system, the installation in itself is a very simple process thanks to apt get. The mail server setting can be done during Nagios installation. It can also be configured later when needed. Note A valid SMTP configuration is needed for Nagios to be able send email notifications. As it can be seen, Nagios supports multiple options for email delivery. The most common options would be Internet Site where the server sends email directly to the recipient. Another widely used option is using smarthost or relay server, in which the server sends the email to an intermediary mail server which in turn is responsible for delivering the mail to the recipient. Next, the domain name of the server has to be included in the next step. Finally, the password for the Nagios admin user nagiosadmin is set. This value can also be changed later. Install Nagios on Cent. OS or RHELyum is used for installation. After setting up the repoforge repository, run yum as follows. Requirements for Monitoring. In this tutorial, we want to monitor the following. All Linux server will be checked every 3 minutes. All Cisco Routers will be checked every 3 minutes. All email alerts should go to the address sentinelexample. Nagios will verify 3 times before sending out any alerts just to be sure that the problem is real. If the RTT to any device exceeds 1. The rest of the tutorial will guide you to configure Nagios on Linux. Nagios Configuration on Ubuntu. It is important to know where Nagios configuration files are located. The following table shows the location of Nagios configuration files on Debian based systems. Customizable scripts used for monitoringetcnagios. Configuration files to add hosts, services, define checks and timersusrlibnagiosplugins. Executable files used for monitoring. The following steps are inter related. Hosts, groups for hosts and adding services to host groups are defined. Adding Host Template. The templates defining what to do with a type host is defined. We use the files provided with the installation as sample. First, define a host template for Linux devices. Edit linux server. The parts with bold font are modified. Next, define a host template for Cisco devices. Best Yoga Teacher Training Programs In India. Modify cisco device. The bold font parts are modified. The highlighted parts are modified. Adding Host. Now that the host template is defined, the actual host to be monitored is added. Again, the files provided by default are used as sample. Name of host template to use. The hostname to be used by nagios. The IP address of the host. Name of host template to use. The hostname to be used by nagios. The IP address of the host. Host Group Definition. For ease of management when there are multiple hosts, it is advisable that hosts of similar types are grouped together. Linux Servers. membersour server comma separated list of members. Cisco Devices. membersour server comma separated list of members. Service Definition. First, the command example host check is defined with warning value of 1. Critical values are 5. One IPv. 4 ping request is transmitted. H HOSTADDRESS w 1. Then, the command is associated with host groups. Linux Servers. checkcommand example host check. Cisco Devices. checkcommand example host check. Contact Definition. The required address for sending email added to Nagios. Root. servicenotificationperiod 2. Finally, a dry run is initiated to check whether there are any configuration errors. If there are no errors, Nagios can be restarted safely. Nagios Configuration on Cent. OSRHELThe following shows the locations of Nagios configuration files on Redhat based systems. Configuration files to add hosts, services, define checks and timersusrlibnagiosplugins. Executable files used for monitoring. Adding Host Template. A template is created to define what needs to be done for a specific type of host. The files provided with the installation is modified. Adding Hosts and Host Groups. The configuration file provided with by default is used as a sample. The hosts and host groups are added in the same file. Adding Linux server. Adding Cisco Router. HOST GROUP DEFINITION. Linux Servers. members our server. Sony Bravia Internet Tv Adobe Flash Player. Service Definition. A service called example host check is defined with warning values of 1. The critical values are 5. Only one IPv. 4 ping request will be transmitted. USER1checkping H HOSTADDRESS w 1. Contact Definition. The email address where alerts will be sent is added into Nagios. Nagios Admin. emailnagioslocalhost, sentinelexample. Finally, we are ready to start the Nagios service. A dry run is recommended to find out errors in configuration. Access Nagios after Configuration. Now you are ready to use Nagios. Nagios can be accessed by opening the URL http IPnagios. UbuntuDebian or http IPnagios in case of Cent. OSRHEL e. g. http 1. The user nagiosadmin needs to be authenticated to access the page. Troubleshooting Nagios. When Nagios is not running the way it is supposed to, the first thing to do would be to initiate a dry run. On Debian or Ubuntu. On Cent. OS or RHEL. The log file may also shed some important clue. The path to the log file is located at varlognagiosnagios.