title: UDP packages appear in wireshark, but are not received by program
body: <p>I am trying to read UDP packages sent by an FPGA with my computer. They are sent
  to port 21844 and to the IP 192.168.1.2 (which is my computer's IP). I can see the package in wireshark, they have no errors. When I run however this little python script, then only a very very small fraction of all packages are received by it, also depending if wireshark is running or not.</p>
  
  <pre><code>import socket
  import sys
  
  
  HOST, PORT = "192.168.1.2", 21844
  sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  sock.bind((HOST,PORT)) 
  received ,address= sock.recvfrom(2048)
  print address
  </code></pre>
  
  <p>I use windows 7 with Norton Internet Security, where I allow all traffic in the firewall for the FPGA IP and also for python. The same program on a Windows XP computer does not receive anything either...</p>
  
  <p>Thanks for any help!</p>