Nagios check nrpe error could not complete ssl handshake

 Nagios check nrpe error could not complete ssl handshake

When you are tying to connect remote host from nagios server using check_nrpe you may get following error.

$ /usr/lib/nagios/plugins/check_nrpe -H remotehostIP

Output:

check_nrpe error could not complete ssl handshake 

Reason for this error is remote host not allowing the nagios server to run command using check_nrpe.

To overcome this problem we need to add ip address of nagios server in remote machine.

Open /etc/nagios/nrpe.cfg using any editor. Then search for allwoed_hosts.

By default allowed host value is allowed_hosts=127.0.0.1

Change 127.0.0.1 to nagios server ip address.

Let’s say if my nagios server ip address 192.168.1.20, you should add as below

allowed_hosts=192.168.1.20

Now restart nagios-nrpe-server in remote host.

$ service nagios-nrpe-server restart

Restart nagios3 and nagios-nrpe-server in nagios server.

$ service nagios3 restart

$ service nagios-nrpe-server restart

Now if you run following command in nagios server, your will get nrpe version details.

$ /usr/lib/nagios/plugins/check_nrpe -H remotehostIP

Output:

NRPE V2.12