Or in the case of Microsoft it is ICMP messages!!!
Greg
At 11:16 PM 4/7/98 -0500, Smoot Carl-Mitchell wrote:
>>Maybe I'm just stupid today, but isn't traceroute just a series of ICMP
packet
>>s
>>with a specific Time-To-Live set in stages? And if ICMP packets are
allowed,
>>how do you block the "traceroute" program?
>
>Traceroute uses UDP packets to a high port number with the TTL incremented by
>one for each packet sent. It listens for the ICMP Time Expired packets
>returning. That is where it derives the IP addresses of each hop.
>
>
>Smoot Carl-Mitchell
>Texas Internet Consulting
>1106 Clayton Lane, Suite 500W
>Austin, TX 78723
>
>+1 512 451-6176
>
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