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Reply To: | Michael P. Smith |
Date: | Wed, 30 Dec 1998 14:36:10 -0600 |
Content-Type: | text/plain |
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Jim Alexander wrote in message ...
>Does anyone know of (or have available) a MPE/iX or a ported (or unported)
GNU
>Trace Route program?
It would be a waste of time. Most (if not all) trace route programs use the
TTL field to timeout a packet before it reaches it's destination. By doing
this they can force a packet to return to the originator (you) with a
timeout error and the name of the IP address it had reached when it timed
out. By starting with a low TTL value and slowly increasing it on a per
packet basis you can find all your individual hops. Unfortunately, the TTL
field is not accessible to HP/3000 programmers. I don't know if this is
true, but I was told that the TTL field is actually hardcoded to some large
number (200 or 2000 or something like that). The reason? Why...no body
would ever want a packet to fail unless there was a problem, would they?
---------------------------------------------------------------
| Michael P. Smith |
| Sr. Systems Programmer |
| The Hertz Corporation [log in to unmask] (work) |
| Oklahoma City, OK [log in to unmask] (personal) |
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