Connect to address 127.0.0.1 port 5666 connection refused

[sirampadu]

/usr/local/nagios/libexec/check_nrpe -H 127.0.0.1
connect to address 127.0.0.1 port 5666: Connection refused
connect to host 127.0.0.1 port 5666: Connection refused

Even though no firewall rules are set on my ubuntu server. I even went ahead and sudo ufw allow 5666/tcp but still no luck.
Help please

[kyang]

Hi @sirampadu,
Which documentation are you following?


Here is the kb article on NRPE Ubuntu specific.

https://support.nagios.com/kb/article.php?id=515#Ubuntu

You can double check to see if you configured the firewall properly and config files.

Let me know if this helps you.

[bolson]

The error message "connection refused" typically means that the request is being blocked by a firewall, or more likely. NRPE is not running. Please post the output of the following three commands:

Code: Select all

netstat -at | grep nrpe
service xinetd status
cat /etc/xinted.d/nrpe

[sheen.lim]

Hi sirampadu

From what I have figured out from your initial post, you are trying to check NRPE services from the NRPE client.

Check_NRPE only is available on NRPE Client (NAgios Server or Monitoring Client), To perform a successful check, you must have 2 hosts. 1 NRPE client (which is the Nagios Monitoring Server, where the package "nagios-nrpe-plugin" is installed) and 1 NRPE Server(which is the server to be monitored, where the package "nagios-nrpe-server" is installed).

After the NRPE server package (nagios-nrpe-server) is installed, it will open a open 5666 port.
On the NRPE client, is where the check_nrpe binary is located. You must target the remote host by issuing command from the NRPE client (Nagios Server)
'/usr/lib/nagios3/plugins/check_nrpe -H IPADDRESS_OF_SERVER_TO_BE_MONITORED'

And Yes, from an NRPE standpoint, the server is the server to be monitored, and the client is the Nagios Server.

[bolson]

Are you running this command:

Code: Select all

/usr/local/nagios/libexec/check_nrpe -H 127.0.0.1

On the host you wish to monitor?