T
 punchthrough</a> success rates is based on what kind of algorithm the 
NAT uses.</p>
	  <p><strong>Full cone NAT</strong>: Accepts any datagrams to a port 
that has been previously used. Will accept the first datagram from the 
remote peer.</p>
      <p><strong>Address-Restricted cone NAT</strong>: Accepts datagrams
 to a port as long as the datagram source IP address is a system we have
 already sent to. Will accept the first datagram if both systems send 
simultaneously. Otherwise, will accept