<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.6001.18183" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>I'm trying to add support for Cisco's proprietary
UDP encapsulation.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>It differs from NAT-T in the following
ways:</FONT></DIV>
<DIV><FONT face=Arial size=2> Gateway port is negotiated using
xconfig instead of using port 4500.</FONT></DIV>
<DIV><FONT face=Arial size=2> ISAKMP traffic stays on port
500.</FONT></DIV>
<DIV><FONT face=Arial size=2> Keepalives are single byte UDP
packets with 0xFF</FONT></DIV>
<DIV><FONT face=Arial size=2> ESP header immediately follows
UDP header.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have all the configuration work done. I'm
having a bit of a problem deciphering what to change in the code to get the ESP
traffic to use UDP protocol packets instead of ESP protocol
packets.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I would appreciate any pointers.</FONT></DIV>
<DIV> </DIV></BODY></HTML>