[Nagiosplug-help] CHECK_NRPE: Socket timeout after 10 seconds.

Soeun Vanny yuta-vanyo at lime.ocn.ne.jp
Tue Apr 19 17:45:26 UTC 2005

when you executed check_nrpe from nagios machine, can you get any messages
being logged by your fifth web server?

Just a suggestion, first you can check whether nrpe daemon works properly or
not by executing check_nrpe on your fifth web server :
1.Add loopback address( into your nrpe.cfg's host_allows
2.Restart Nrpe daemon
3.On the fifth web server execute check_nrpe,i.e
./check_nrpe -H localhost -c check_disk

----- Original Message ----- 
From: "Chris Knight" <boheme at gmail.com>
To: <nagiosplug-help at lists.sourceforge.net>
Sent: Wednesday, April 20, 2005 8:02 AM
Subject: [Nagiosplug-help] CHECK_NRPE: Socket timeout after 10 seconds.


  I am having a bit of a problem, and wanted to see if anyone had any
insights that might lead to a solution.  I have several machines in a
co-lo, behind a firewall, and privately addressed in 10.1.x.y.  There
are four web servers monitored by Nagios, which lives on a fifth
machine.  NRPE is used to check local disk space on each of the web
servers.  I just added a fifth web server.  I have NRPE installed to
run as a daemon, and the Nagios machine is listed by IP address on the
allowed_hosts line.   When I invoke chech_nrpe by hand, this is what I

$ /opt/nagios/libexec/check_nrpe -H -p 5666 -c check_disk_boot
CHECK_NRPE: Socket timeout after 10 seconds.

I have searched the archive already and the one suggestion I saw,
which worked for the original poster, was to turn off any local
firewalls.  While I do have a local firewall, I removed all the rules,
and the problem still exists:

$ /sbin/iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Also, I can telnet to on port 5666 from the Nagios machine,
and I am able to establish a connection.  According to netstat when I
telnet a connection exists, which is another reason I don't think it
is a firewall issue.  (Please, prove me wrong if it will solve my
problem.  :)

Any thoughts?


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