title: Unwanted RST TCP packet with Scapy
body: <p>In order to understand how TCP works, I tried to forge my own TCP SYN/SYN-ACK/ACK (based on the tutorial: <a href="http://www.thice.nl/creating-ack-get-packets-with-scapy/" rel="noreferrer">http://www.thice.nl/creating-ack-get-packets-with-scapy/</a> ).</p>
  
  <p>The problem is that whenever my computer recieve the SYN-ACK from the server, it generates a RST packet that stops the connection process.</p>
  
  <p>I tried on a OS X Lion and on a Ubuntu 10.10 Maverick Meerkat, both reset the connection. I found this: <a href="http://lkml.indiana.edu/hypermail/linux/net/0404.2/0021.html" rel="noreferrer">http://lkml.indiana.edu/hypermail/linux/net/0404.2/0021.html</a>, I don't know if it is the reason.</p>
  
  <p>Does anyone could tell me what could be the reason? And how to avoid this problem?</p>
  
  <p>Thank you.</p>