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<code>vi /etc/nagios/nrpe.cfg</code>
Add an allowed_hosts IP Address to nrpe.cfg file eg. 142.204.133.123 (chile’s IP Address), but for future configuration configurations HongKong' s IP Address will beused:
<code> Allowed_hosts=142.204.133.123 </code>
</pre>
4. Add a firewall rule to the INPUT chain - CAVEAT: The ARM machines do not utilize iptables, so the line below may not be required.
<code>iptables -I INPUT -p tcp -m tcp --dport 5666 -j ACCEPT</code>