title: Nagios - Connection refused & Socket timeout
body: <p>I need to monitor windows services(like CPU load, memory usage etc.), so I have installed Nagios monitoring tool. The installation is complete and 'check_nt' plugin is also installed.
  Upto this no error is there, but while executing scripts with agent NSClient++ 'Connection refused by host' error still persists.</p>
  
  <pre><code>./check_nt -H 10.112.32.78 -p 1248 -v MEMUSE -w 80 -c 90
                Connection refused by host
  
  ./check_nt -H 10.112.32.78 -p 1248 -v MEMUSE -w 80 -c 90
                Socket timeout after 10 seconds
  </code></pre>
  
  <hr>
  
  <p>I have verified that nagios is working correctly, as under.</p>
  
  <pre><code>/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
  
  Nagios Core 3.4.1
  Copyright (c) 2009-2011 Nagios Core Development Team and Community Contributors
  Copyright (c) 1999-2009 Ethan Galstad
  Last Modified: 05-11-2012
  License: GPL
  
  Website: http://www.nagios.org
  Reading configuration data...
     Read main config file okay...
  Processing object config file '/usr/local/nagios/etc/objects/commands.cfg'...
  Processing object config file '/usr/local/nagios/etc/objects/contacts.cfg'...
  Processing object config file '/usr/local/nagios/etc/objects/timeperiods.cfg'...
  Processing object config file '/usr/local/nagios/etc/objects/templates.cfg'...
  Processing object config file '/usr/local/nagios/etc/objects/localhost.cfg'...
     Read object config files okay...
  
  Running pre-flight check on configuration data...
  
  Checking services...
      Checked 8 services.
  Checking hosts...
      Checked 1 hosts.
  Checking host groups...
      Checked 1 host groups.
  Checking service groups...
      Checked 0 service groups.
  Checking contacts...
      Checked 1 contacts.
  Checking contact groups...
      Checked 1 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 24 commands.
  Checking time periods...
      Checked 5 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
  </code></pre>
  
  <p>M new to nagios, thanks in advance :)</p>