Traceroute Port Numbers

I Have a question regarding the port number behavior in traceroute.

I found a note in a Wonder-Volume I of INEWB which says that it's OK to
match UDP port range of 33434 till 33464, since those ports
will be used as destination UDP ports during traceroute to the ultimate
destination.

That is a range of 30 ports, since Traceroute is normally limited to 30
hops.

One thing that I found interesting is that port numbers increase not
per-hop, but per-packet.
Say I'm pinging some host 5 hops away. I'm sending 15 packets (3 packets per
hop) and every other packet has its port incremented.

Consequently a range of 30 port numbers will limit the traceroute to 10 hops
and won't let it any further.

Shouldn't we make a 90-port range in this occasion?

Please correct me or confirm.

Nick
GREENNET
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Received on Wed Jul 01 2009 - 21:58:01 ART