implements <a href="../../../../../../org/apache/tools/ant/taskdefs/condition/Condition.html" title="interface in org.apache.tools.ant.taskdefs.condition">Condition</a></pre>
<div class="block">Test for a host being reachable using ICMP "ping" packets & echo operations.
 Ping packets are very reliable for assessing reachability in a LAN or WAN,
 but they do not get through any well-configured firewall. Echo (port 7) may.
 <p/>
 This condition turns unknown host exceptions into false conditions. This is
 bec