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Re: tcptraceroute outcome
From: Julien <Security () aqwz Com>
Date: Sat, 16 Sep 2006 10:52:47 +0200

Christian Perst wrote:
Hi list members,

with tcptraceroute I get
...
 7  213.225.aaa.aaa (213.225.aaa.aaa)  24.396 ms  25.027 ms  25.306 ms
 8  213.225.bbb.bbb (213.225.bbb.bbb)  29.464 ms  29.012 ms  29.285 ms
 9  213.225.ccc.ccc (213.225.ccc.ccc)  29.967 ms  30.912 ms  29.656 ms
10  193.41.ddd.ddd (193.41.ddd.ddd) [closed]  30.694 ms
    213.225.ccc.ccc (213.225.ccc.ccc)  30.265 ms
    193.41.ddd.ddd (193.41.ddd.ddd)  30.501 ms

That seems strange. Could that be a Router with 2 IPs 213.225.ccc.ccc
on one interface and 193.41.ddd.ddd on the other interface?

  
no you can't know the second ip of that router with your traceroute.

193.41.ddd.ddd is at 99% an other router. But it's seems that there is a routing problem,
perhaps a wrong route on the router 193.41.ddd.ddd


Why does ccc send "time exceeded" after the package has reached ddd?
  

Because when the package arrive on ccc, the ttl is null.


/Julien

Thank,
Chris

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