title: ICMP Ping packet is not generating a reply when using Scapy
body: <p>I recently began exploring Scapy. A wonderful tool indeed! </p>
  
  <p>I have a problem... When I monitor my network card using Wireshark and I do a regular ping from the systems command prompt with the standard PING installation, wireshark pops up with "Ping request" and then "Ping reply" indication that it sent a reply. But when i do it manually in Scapy, it sends no reply back.. How can this be? I spent alot of time trying to figure this out so i really hope someone can shed some light on this issue of mine...</p>
  
  <p>Here is the code i used:</p>
  
  <pre><code>&gt;&gt;&gt; from scapy.all import IP, ICMP, send
  &gt;&gt;&gt; IP = IP(dst="127.0.0.1")
  &gt;&gt;&gt; Ping = ICMP()
  &gt;&gt;&gt; send(IP/Ping)
  </code></pre>
  
  <p>The packet is sent successfully and Wireshark shows a Ping request received, but not that it has sent a reply back.</p>