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Purpose : Some times Isp Or vps provider they block port 5666 Or for any reason if you want to configure nrpe to listen different port example 15666, follow as bellow:

On the Remote host(linux-vps) :

1. Change the Port number in : /etc/xinetd.d/nrpe

# default: on
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
        flags           = REUSE
        socket_type     = stream
       port            = 15666
        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 ip.of.nagios.server
}

2. Change port number : vi /etc/services

nrpe            15666/tcp                        # NRPE

3. Change port number in : /usr/local/nagios/etc/nrpe.cfg

server_port=15666

4 . Restart nrpe daemon : service xinetd restart

On the server(nagiosserver) :
Purpose : Example, I have more then 10 linux server. 9 of them listen port 5666 , but only one of them listen port 15666 . So I need to create a different set of commands for nagios server to connect that nrpe client on different port.

1. Create a command in command.cgi file ( /usr/local/nagios/etc/objects/commands.cgi)

#This is slightly modified from check_nrpe command
#Because Vps company they blocked port 5666
#So i had to configure linuxvps server to listen on port  15666, So
#I need to create a different command to connect to different port
 
define command{
command_name check_nrpe_vps
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -p 15666 -c $ARG1$
}

2. Now call this check_nrpe_vps commands from host definition file
Example : host definition file for linuxvps is : linuxvps.cgi ( /usr/local/nagios/etc/objects/linuxvps.cgi)

   define service{
   use generic-service
   host_name linuxvps
   service_description CPU Load
  check_command check_nrpe_vps!check_load
}

3. now Call this linuxvps.cgi from nagios.cfg file

  cfg_file=/usr/local/nagios/etc/objects/linuxvps.cfg

4. restart the nagios.
So now this nagios server will connect to nrpe client via 15666 port.

Tags: configure nrpe on different port

This entry was posted on Thursday, April 15th, 2010 at 8:24 pm and is filed under Linux, Nagios. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.