Bandwidth monitoring using nagios

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check_traffic is a very nice tool to alert the server bandwidth usage in linux servers. Its very easy to configure but very powerful.

Download & Install plugin  :-

http://exchange.nagios.org/directory/Plugins/Network-Connections,-Stats-and-Bandwidth/check_tcptraffic/details24

$ wget check_tcptraffic-2.2.3.tar.gz
$ tar -zxf check_tcptraffic-2.2.3.tar.gz
$ cd check_tcptraffic-2.2.3
In the source directory run:
$ perl Makefile.PL
$ make
$ make install

Client server nrpe.cfg

command[check_traffic]=/usr/lib64/nagios/plugins/check_tcptraffic-2.2.3/check_tcptraffic  -c <value>  -w <value > -i eth0 -s 100

$ /etc/init.d/nrpe restart

Nagios Server/Services config

define service {
service_description         Server Bandwidth Usage
hosts                           adminlogs.info
normal_check_interval     5
retry_check_interval       1
contact_groups              admins
notification_interval        60
notification_period          wakinghours
check_command             nrpe_check!check_traffic
use                              generic-service
}

Verify the nagios conf and restart nagios

$ nagios -v /etc/nagios/nagios.cfg

$ /etc/init.d/nagios restart

Yes , that’s it. You can relax , Nagios will alert you about your server bandwidth usage 🙂