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Client NRPE Install

• Download nrpe and nagios-plugin.
  Tarball names will vary depending on the release number of the packages
• wget http://assets.nagios.com/downloads/nagiosplugins/nagios-plugins-1.5.tar.gz
• wget http://softlayer-dal.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.15/nrpe-2.15.tar.gz
• tar -xf nrpe-2.15.tar.gz
• tar -xf nagios-plugins-1.5.tar.gz

Nagios Plugin Installation

• cd nagios-plugins-1.5
• ./configure
• make
• make install
• chown nagios.nagios /usr/local/nagios
• chown -R nagios.nagios /usr/local/nagios/libexec

NRPE Installation

• cd ..
• cd nrpe-2.15
• ./configure
• make all
• make install-plugin
• make install-daemon
• make install-daemon-config
• make install-xinetd
• edit /etc/xinetd.d/nrpe
  add the name of the Nagios server to the line
  only_from = 127.0.0.1
• edit /etc/services
  add the line
  nrpe 5666/tcp
• Restart xinetd daemon with
  service xinetd restart

Test NRPE

• Test nrpe with
  netstat -at | grep nrpe
• Edit TCP wrappers
  vi /etc/hosts.allow
  Add the line
  nrpe: 17.0.0.1 server.name.domain.edu
  where server.name.domain.edu is your Nagios server DNS name

Test New client

• /usr/local/nagios/libexec/check_nrpe -H localhost

If you get back the NRPE version number, you are done on the client

Setup IPTABLES

• iptables -I RH-Firewall-1-INPUT -p tcp -m tcp –dport 5666 -j ACCEPT
  lets all packets with a destination of port 5666 past the firewall

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Published on: Mar 03, 2021