The capture shown in my article was captured with tcpdump on the linux box
performing the traceroute. I used Etherpeek to open the dump so that it
would be more readable.
The reply packets are definitely port unreachables - type 3, code 3. There
is no question about that. It would seem to follow then, that the router is
opening layer 4.
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This archive was generated by hypermail 2b29 : Fri Mar 07 2003 - 22:00:01 EST