Nagios Support Forum

Hi Scott,

The below settings didn't work

Is there anything else i might missing?

To see if we are barking up the right tree, could we stop iptables temporarily and run the following from the Nagios Server then to re-enable iptables

Hi Scott,

I stopped the iptables then:

When i ran /usr/local/nagios/libexec/check_nrpe -H host.ip.address.here , below are the results i got:

IF host.ip.address = NAGIOS IP ADDRESSS , it is showing couldn't complete SSL handshake
IF host.ip.address = Target server which i want to monitor, it is showing socket timeout.
IF host.ip.address = localhost, it is showing NRPE v2.12.

Then I started the iptables.

Thanks,
Manish

manish2tiwari wrote:IF host.ip.address = Target server which i want to monitor, it is showing socket timeout.

This is the one we are interested in and it appears something is blocking between the 2 machines.

Can you ping the target server from your XI server?

Hi Scott,

yes, we are able to ping the target server from our Nagios Server.

thanks

Next step, letstry to connect to port 5666 with telnet from the XI server

Hi Scott,

Telnet saying:

telnet: connect to address **************** : Connection timed out
telnet: Unable to connect to remote host: Connection timed out

Thanks,
Manish

Ok, so earlier I had you run this on the remote machine Which you did and the port was open.

So if you cannot telnet to the port you must have a firewall somewhere between the 2 machines that is blocking port 5666

Hi Scott,

the machine which i am trying to connect is showing below results FOR netstat -lnp |grep 5666:

tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN 31397/nrpe

Thanks,
Manish

Correct. So it is listening, but as per your telnet test you cannot connect to that port, which means that there is something blocking the port between the 2 machines, like a firewall or router configuration..