title: userparameters and ZBX_NOTSUPPORTED
body: <p>I want to ping an external ip from all of my servers that run zabbix agent.</p>
  
  <p>I searched and find some articles about zabbix user parameters.
  In <code>/etc/zabbix/zabbix_agentd.conf.d/</code> I created a file named <code>userparameter_ping.conf</code> with following content:</p>
  
  <pre><code>UserParameter=checkip[*],ping -c4 8.8.8.8 &amp;&amp; echo 0 || echo 1
  </code></pre>
  
  <p>I created an item named <code>checkip</code> in zabbix server with a graph but got no data. After some another digging I found <code>zabbix_get</code> and tested my userparameter but I got the error : <code>ZBX_NOTSUPPORTED</code></p>
  
  <pre><code># zabbix_get -s 172.20.4.43 -p 10050 -k checkip
  </code></pre>
  
  <p>my zabbix version : </p>
  
  <pre><code>Zabbix Agent (daemon) v2.4.5 (revision 53282) (21 April 2015)
  </code></pre>
  
  <p>Does anybody know what I can do to address this?</p>