CHECK_NRPE: Error - Could not complete SSL handshake

[Dermot Duffy]

Issue Resolved.

TCP_wrappers was the culprit.

R,
D.

From: Dermot Duffy
Sent: 06 December 2011 17:04
To: nagios-users at lists.sourceforge.net
Subject: CHECK_NRPE: Error - Could not complete SSL handshake

Hi,

I have installed the following on a RHEL 5.4 blade server:


-          nagios-3.2.1

-          nagios-plugins-1.4.11

-          nrpe-2.12

Install went smoothly, compiled without error.

Now trying to connect to my nagios server and get the following:

# /usr/local/nagios/libexec/check_nrpe -H localhost
CHECK_NRPE: Error - Could not complete SSL handshake.

Port appears to be listening:
[root at node2 ~]# netstat -at | grep nrpe
tcp        0      0 *:nrpe                      *:*                         LISTEN
[root at node2 ~]# netstat -plan | grep 5666
tcp        0      0 0.0.0.0:5666                0.0.0.0:*                   LISTEN      22482/xinetd

Messages log shows the following:
2011-12-06T16:54:22.553812+00:00 node2 xinetd[2154]: libwrap refused connection to nrpe (libwrap=nrpe) from 127.0.0.1
2011-12-06T16:54:22.553834+00:00 node2 xinetd[2154]: FAIL: nrpe libwrap from=127.0.0.1
2011-12-06T16:54:22.554039+00:00 node2 xinetd[22482]: START: nrpe pid=2154 from=127.0.0.1
2011-12-06T16:54:22.554104+00:00 node2 xinetd[22482]: EXIT: nrpe status=0 pid=2154 duration=0(sec)

My /etc/xinetd.d/nrpe is configured correctly as I have got several other servers (same spec) working fine.

I get the following from my nagios server when trying to telnet the port:
[root at nagios_server]# telnet node2 5666
Trying 192.168.235.50...
Connected to ocmp2.brandtone.lan (192.168.235.50).
Escape character is '^]'.
Connection closed by foreign host.

R,
D.




____________________________________________________________________________________________________________________________________________________________________________________________
[Description: Description: Description: Description: Brandtone Side Bar logo cropped]
Dermot Duffy
IT Infrastructure Technical Lead
www.brandtone.ie<http://www.brandtone.ie/> | Dermot.Duffy at brandtone.ie<mailto:Dermot.Duffy at brandtone.ie>
M: +353 85 711 7530

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