Martin Rex wrote: >> According to your theory, a universal NAT traversal protocol >> should already exists. > > Correct. It is called the HTTP CONNECT method. If, with your definition of "traversal", tunneling is a form of traversal, tunneling by IPSEC is a standard firewall traversal protocol and is much better than HTTP CONNECT because of UDP. So, we are done. Masataka Ohta _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf