Monitorización de puertos y servicios con Nagios

Vamos a ver como monitorizar Puertos  y servicios básicos como SSH con nagios, para ello vamos a partir de los manuales que hemos realizado sobre monitorización básica en Windows y GNU/Linux

Monitorización basica de UNIX – *BSD – GNU/Linux en Nagios
Monitorización basica de Windows en Nagios

En mi caso voy a monitorizar el Puerto 10000 (Webmin), 22 (SSH) , 3389 (Terminal server) y 80 en el cual esta corriendo ISS, pero podéis monitorizar cualquier otro puerto.

Definir los comandos : 

Este comando ya viene definido por defecto en nagios.

para definir tenemos que añadir los siguientes comandos al fichero commands.cfg, este fichero estará… dependiendo de la instalación que habríais realizado

vi /etc/nagios3/commands.cfg

 

Y añadimos lo siguiente (En caso de no tenerlos ya):

define command{
command_name check_tcp
command_line $USER1$/check_tcp -H $HOSTADDRESS$ -p $ARG1$
}

# ‘check_ssh’ command definition
define command{
command_name check_ssh
command_line $USER1$/check_ssh $ARG1$ $HOSTADDRESS$
}

Accedemos al direcctorio 

Accedemos al directorio donde se encuentran los archivos de configuración en mi caso (/etc/nagios3/etc/cfg/Linux/)

cd /etc/nagios3/etc/cfg/Linux

Añadimos el nuevo chequeo. 

vi cacti.cfg

Agregamos lo siguiente: 

define service {
use linux-srv
host_name cacti_192.168.1.111
service_description Puerto 10000 [Webmin]
check_command check_tcp!10000
}

define service {
use linux-srv
host_name cacti_192.168.1.111
service_description Puerto 22 [Servicio SSH]
check_command check_ssh
}

Ahora vamos a realizar exactamente lo mismo con el puerto 3389

Accedemos al directorio donde se encuentran los archivos de configuración

cd /etc/nagios3/etc/cfg/Windows

Añadimos el nuevo chequeo. 

vi cpd01.cfg

Agregamos lo siguiente: 

define service {
use windows-srv
host_name cpd_192.168.1.112
service_description Puerto 3389 [TS]
check_command check_tcp!3389
}

define service {
use windows-srv
host_name cpd_192.168.1.112
service_description Puerto 80 [Servidor ISS]
check_command check_tcp!80
}

 

 

Chequeamos para ver si no hay ningún error en los archivos de configuración

rokitoh@nagios:/etc/nagios3/etc/cfg/Windows# nagios3 -v /etc/nagios3/nagios.cfg

Nagios Core 3.2.1

Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 03-09-2010
License: GPL

Website: http://www.nagios.org
Reading configuration data…
Read main config file okay…
Processing object config file ‘/etc/nagios3/commands.cfg’…
Processing object config directory ‘/usr/lib/nagios/plugins’…
Processing object config file ‘/usr/lib/nagios/plugins/mailq.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_storage.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/ifstatus.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_load.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/breeze.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/ftp.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/apt.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/tcp_udp.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/ntp.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/dummy.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/mrtg.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/rpc-nfs.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/users.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/games.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/real.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/pgsql.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_vrrp.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/flexlm.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_win.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/ssh.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/ping.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/news.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/telnet.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/radius.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/fping.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/netware.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_cpfw.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_process.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/procs.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/ldap.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/mysql.cfg’…
Processing object config directory ‘/usr/lib/nagios/plugins/doc’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_int.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_mem.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/snmp_env.cfg’…
Processing object config file ‘/usr/lib/nagios/plugins/load.cfg’…
Processing object config directory ‘/etc/nagios3/conf.d’…
Processing object config file ‘/etc/nagios3/conf.d/timeperiods_nagios2.cfg’…
Processing object config file ‘/etc/nagios3/conf.d/contacts.cfg’…
Processing object config file ‘/etc/nagios3/conf.d/generic-host_nagios2.cfg’…
Processing object config file ‘/etc/nagios3/conf.d/generic-service_nagios2.cfg’…
Processing object config file ‘/etc/nagios3/etc/cfg/Windows/templete.cfg’…
Processing object config file ‘/etc/nagios3/etc/cfg/Windows/hosts.cfg’…
Processing object config file ‘/etc/nagios3/etc/cfg/Windows/cpd01.cfg’…
Processing object config file ‘/etc/nagios3/etc/cfg/Windows/contacts.cfg’…
Processing object config file ‘/etc/nagios3/etc/cfg/Linux/templete.cfg’…
Processing object config file ‘/etc/nagios3/etc/cfg/Linux/hosts.cfg’…
Processing object config file ‘/etc/nagios3/etc/cfg/Linux/cacti.cfg’…
Processing object config file ‘/etc/nagios3/etc/cfg/Linux/contacts.cfg’…
Read object config files okay…

Running pre-flight check on configuration data…

Checking services…
Checked 11 services.
Checking hosts…
Checked 2 hosts.
Checking host groups…
Checked 2 host groups.
Checking service groups…
Checked 0 service groups.
Checking contacts…
Checked 3 contacts.
Checking contact groups…
Checked 3 contact groups.
Checking service escalations…
Checked 0 service escalations.
Checking service dependencies…
Checked 0 service dependencies.
Checking host escalations…
Checked 0 host escalations.
Checking host dependencies…
Checked 0 host dependencies.
Checking commands…
Checked 193 commands.
Checking time periods…
Checked 4 time periods.
Checking for circular paths between hosts…
Checking for circular host and service dependencies…
Checking global event handlers…
Checking obsessive compulsive processor commands…
Checking misc settings…

Total Warnings: 0
Total Errors: 0

Things look okay – No serious problems were detected during the pre-flight check

 

Y reiniciamos nagios

rokitoh@nagios:/etc/nagios3/etc/cfg/Windows# service nagios3 reload
Reloading nagios3 monitoring daemon configuration files: nagios3.

Abrimos nagios en nuestro navegador favorito y si todo a salido bien lo tendríamos que tener OK!