Problems: CHECK_NRPE: Socket timeout after 10 seconds.

[psyllex]

I'm having trouble getting NRPE to respond to my Nagios Server. I've been getting the message: CHECK_NRPE: Socket timeout after 10 seconds.

I've added firewall rules for port 5666:

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 iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
   iptables -A FORWARD -p tcp --dport 5666 -m state --state NEW -j ACCEPT

I've made sure the 'only_from' in /etc/xinetd.d is set to my server address. I have also added an argument so that it doesn't use ssl (as I was getting "Couldn't complete SSL handshake" error).

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 server_args = -c /usr/local/nagios/etc/nrpe.cfg -n --inetd
  ..
  ..
  only_from = 127.0.0.1 10.10.0.100 <--(it's an network that is cut off from the actual internet)

I'm not sure if the fact that the switch has been disconnected from the actual internet but I wouldn't think so. It runs like any regular network, except we can't access anything outside our little internal network.
Could someone help me out with this? I really don't know what the problem is.

[slansing]

Can you show us an example of the check you are running? From the command line?

[psyllex]

Yes here's a the check users that came with the Nagios Plugins (I think):

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define service{
  use                           generic-service
  host_name                server1, server2
  service_description    Current Users
  check_command       check_nrpe!check_users
}

I should note that when I run commands on the terminal on the 'remote' host; the results I get back are fine. example:

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me@myNet:/usr/local/nagios/etc$ /usr/local/nagios/libexec/check_procs -w 150 -c 200
PROCS OK: 105 processes

[slansing]

I mean, can you show how the command is being run. Take the command you are getting the error from and run it manually from the command line of the Nagios system.

[psyllex]

I mean, can you show how the command is being run. Take the command you are getting the error from and run it manually from the command line of the Nagios system.

I'm gettting that error on all my commands within Nagios (the interface is lit up in pink with critical statuses). But from the terminal:

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me@myNet:/usr/local/nagios/etc/objects$ /usr/local/nagios/libexec/check_nrpe -H 10.10.0.102
CHECK_NRPE: Socket timeout after 10 seconds.

I hope that is what you're asking for.

[psyllex]

I figured out what was wrong for the most part. It wanted to use ssl. Even though I have it installed on my machine, it wasn't working for whatever reason. So I simply added an:

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-n

to my commands. I have other problems now of course, but at least that got taken care of.

[yancy]

psyllex,

When you compile the plugins you may not have compiled with SSL support

this link has a good explanation of how to compile with SSL support included
http://www.ehow.com/how_7642632_compile ... ption.html

Thanks,

-Yancy

[psyllex]

psyllex,

When you compile the plugins you may not have compiled with SSL support

this link has a good explanation of how to compile with SSL support included
http://www.ehow.com/how_7642632_compile ... ption.html

Thanks,

-Yancy

Ok thanks for the info. Now my issue is that it is saying that NRPE: Unable to read output. Do you have any thoughts on that, that may help?

[lmiltchev]

From the official NRPE documentation:

The check_nrpe plugin returns "NRPE: Unable to read output"
This error indicates that the command that was run by the NRPE daemon did not return any character output.
This could be an indication of the following problems:
– An incorrectly defined command line in the command definition. Verify that the command definition in your
NRPE configuration file is correct.
– The plugin that is specified in the command line is malfunctioning. Run the command line manually to make
sure the plugin returns some kind of text output.

What is the check that you are trying to run?

[psyllex]

I'm sure trying to run check_nrpe!check_procs that comes with the installation of Nagios plugins