[CentOS] Could not complete SSL handshake to Amazon EC2 host

[Eric Lehmann]

This is strange...
Do you have SSL aktive on both systems? Run nrpr localy without parameters
(this should return some nrpe stats) and check ldd for libssl.
Am 01.05.2015 07:32 schrieb "Tim Dunphy" <bluethundr at gmail.com>:

> Hi Eric,
>
>  Thanks for your reply. I do have nrpe running under xinetd on the host I'm
> trying to monitor.
>
>  And running the nrpe checl locally:
>
> [root at ops:~] #/usr/local/nagios/libexec/check_nrpe -H localhost
> NRPE v2.15
>
> [root at ops:~] #grep only_from /etc/xinetd.d/nrpe
>         only_from       = 127.0.0.1 216.120.248.126
>
> And I do have port 5666 open on the security group for this host.
>
> And I made sure the local firewall was stopped, because I am blocking ports
> with the security groups instead.
>
> [root at ops:~] #service iptables status
> Firewall is stopped.
>
> It's only when checking from the monitoring host that nrpe fails:
>
> [root at monitor1:~] #/usr/local/nagios/libexec/check_nrpe -H
> ops.jokefire.com
> CHECK_NRPE: Error - Could not complete SSL handshake.
>
> Really, really puzzling. This is driving me up a wall!! I hopeI can solve
> this soon....
>
> Thanks for any and all help with this one!!
> Tim
>
> On Fri, May 1, 2015 at 1:02 AM, Eric Lehmann <e.lehmann88 at gmail.com>
> wrote:
>
> > Hi
> > Does the deamon run under xinetd? Then  you have to configure the
> only_from
> > in  */etc/**xinetd.d**/**nrpe* to.
> >
> > Regards
> > Eric
> > Am 01.05.2015 06:46 schrieb "Tim Dunphy" <bluethundr at gmail.com>:
> >
> > > Hello,
> > >
> > >  I am trying to monitor a host in the Amazon EC2 cloud.
> > >
> > > Yet when I try to check NRPE from the monitoring host I am getting an
> SSL
> > > handshake error:
> > >
> > > [root at monitor1:~] #/usr/local/nagios/libexec/check_nrpe -H
> > > ops.jokefire.com
> > > CHECK_NRPE: Error - Could not complete SSL handshake.
> > >
> > > And if I telnet into the host on port 5666 to see if the FW port is
> open,
> > > the connection closes right away:
> > >
> > > [root at monitor1:~] #telnet ops.somewhere.com 5666
> > > Trying 54.225.218.125...
> > > Connected to ops.somewhere.com.
> > > Escape character is '^]'.
> > > Connection closed by foreign host.
> > >
> > > You can see there it connects, but then it closes immediately after the
> > > connection.
> > >
> > >  I have NRPE running on the host I want to monitor:
> > >
> > > [root at ops:~] #lsof -i :5666
> > > COMMAND  PID USER   FD   TYPE DEVICE SIZE NODE NAME
> > > xinetd  1434 root    5u  IPv4   4063       TCP *:nrpe (LISTEN)
> > >
> > > And I have the IP of my nagios server listed in the xinetd conf file:
> > >
> > > [root at ops:~] #cat /etc/xinetd.d/nrpe
> > > # default: on
> > > # description: NRPE (Nagios Remote Plugin Executor)
> > > service nrpe
> > > {
> > >         flags           = REUSE
> > >         socket_type     = stream
> > >         port            = 5666
> > >         wait            = no
> > >         user            = nagios
> > >         group           = nagios
> > >         server          = /usr/local/nagios/bin/nrpe
> > >         server_args     = -c /usr/local/nagios/etc/nrpe.cfg --inetd
> > >         log_on_failure  += USERID
> > >         disable         = no
> > >         only_from       = 127.0.0.1 xx.xx.xx.xx   # <- representing my
> > real
> > > nagios server IP
> > > }
> > >
> > >
> > >
> > > And I have my default security group for that host open on port 5666 to
> > the
> > > world for this experiment.  I plan on locking that down again to the
> > single
> > > IP of my monitoring host once I get this resolved.
> > >
> > > Does anyone have any suggestions on how I can get that problem solved?
> > >
> > > Thanks,
> > > Tim
> > >
> > > --
> > > GPG me!!
> > >
> > > gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B
> > > _______________________________________________
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> > >
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>
>
>
> --
> GPG me!!
>
> gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B
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