[Nagiosplug-help] Fail to telnet NRPE port (5666)

[Guy Waugh]

eugene wrote:
> Guy,
>  
>  > Just a thought: Have you set up the nagios user on the remote host? This
>  > is necessary, as this user is specified in your /etc/xinetd.d/nrpe 
> file...
> I also create a nagios user in remote host
> 
>  > If you have already set up the nagios user on the remote host, have you
>  > tried executing the check_load plugin on the remote host as the 
> nagios user? 
> I tried to login as "nagios" and use the check_load plugin as below. It 
> works
>  
> [nagios at Testing libexec]$ ./check_load -w 5 -c 6
> OK - load average: 0.00, 0.00, 
> 0.00|load1=0.000000;5.000000;6.000000;0.000000 
> load5=0.000000;5.000000;6.000000;0.000000 
> load15=0.000000;5.000000;6.000000;0.000000
>  
> How to check all the steps below? I get this from nagios FAQ
>  
> #   *Different versions*. Make sure you are using the same version of the 
> check_nrpe plugin and the NRPE daemon. Newer versions of NRPE are 
> usually not backward compatible with older versions.
> # *SSL is disabled*. Make sure both the NRPE daemon and the check_nrpe 
> plugin were compiled with SSL support and that neither are being run 
> without SSL support (using command line switches).
> # *Incorrect file permissions*. Make sure the NRPE config file (nrpe.cfg) 
> is readable by the user (i.e. nagios) that executes the NRPE binary from 
> inetd/xinetd.
> # *Pseudo-random device files are not readable*. Greg Haygood noted the 
> following... "After wringing my hair out and digging around with truss, 
> I figured out the problem on my Solaris 8 boxen. The files 
> /devices/pseudo/random* (linked through /dev/*random, and provided by 
> Sun patch 112438) were not readable by the nagios user I use to launch 
> NRPE. Making the character devices world-readable solved it."
> # *Unallowed address*. If you're running the NRPE daemon under xinetd, 
> make sure that you have a line in the xinetd config file that say 
> "only_from = xxx.xxx.xxx.xxx", where xxx.xxx.xxx.xxx is the IP address 
> that you're connected to the NRPE daemon from.
>  
> ------------------------------------------------------------------------------------------------------------
> *Different versions*
> - I should have the same version on both remote host and nagios server
> - I am using nrpe-2.0
> ** 
> *SSL is disabled*
> *-* How to check this?
> ** 
> *Incorrect filer permission*
> - I think should be correct
> -rw-rw-rw-    1 nagios   nagios       5076 May 18 03:07 nrpe.cfg
> ** 
> *Pseudo-random device files are not readable*.
> - How to check this?
> ** 
> *Unallowed address*
> - I think is correct
> ** 
>          # default: on
>         # description: NRPE
>         service nrpe
>         {
>                 flags           = REUSE
>                 socket_type     = stream
>                 wait            = no
>                 user            = nagios
>                 server          = /usr/local/nagios/nrpe
>                 server_args     = -c /usr/local/nagios/nrpe.cfg --inetd
>                 log_on_failure  += USERID
>                 disable         = no
>                 only_from       = 10.1.8.77

So the Nagios server is 10.1.8.77...? Everything else looks good to me...

Is there anything in the logs, on either the Nagios server or the remote 
server?

You could turn debug on in nrpe.cfg on the remote server, and send all 
debug messages to a file in the remote server's /etc/syslog.conf... 
maybe something will show up there. Otherwise, I'm out of ideas I'm 
afraid...

Regards,
Guy.

>         }
> ** 
> *--------------------------------------------------------*
> Any part i make mistake?
> ** 
> Guy, Thanks for the reply and help....
>  I still need help :)
> Regards,
> Eugene
>