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traceroute


daedalus
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Hey. I was playing around with traceroute in linux and I am having problems with the UDP side of things. I first tried normal UDP tracerouting, and here are my results

daedalus@linux:~$ traceroute google.com

ctraceroute: Warning: google.com has multiple addresses; using 64.233.187.99

traceroute to google.com (64.233.187.99), 30 hops max, 40 byte packets

 1  * * *

 2  * * *

 3  * * *

 4  * * *

 5  * * *

 6  * * *

 7  * * *

 8  * * *

 9  * * *

10  * * *

11  * * *

12  * * *

13  * * *

14  * * *

15  * * *

16  * * *

17  * * *

18  * * *

19  * * *

20  * * *

21  * jc-in-f99.google.com (64.233.187.99)  96.280 ms *

Seemed very strange, so I tried the ICMP windows-like options.

daedalus@linux:~$ traceroute -I google.com



traceroute: Warning: google.com has multiple addresses; using 64.233.187.99

traceroute to google.com (64.233.187.99), 30 hops max, 40 byte packets

 1  * * *

 2  < this step works >  13.853 ms  13.447 ms  13.438 ms

 3  < as does this one >  15.445 ms  13.514 ms *

 4  te-9-4-ar01.aurora.co.denver.comcast.net (68.86.103.82)  16.687 ms  14.146 ms  20.078 ms

 5  68.86.128.53 (68.86.128.53)  14.210 ms  14.343 ms  17.315 ms

 6  12.116.159.5 (12.116.159.5)  15.829 ms  16.349 ms  16.821 ms

 7  tbr1013801.dvmco.ip.att.net (12.123.207.138)  42.655 ms  41.976 ms  41.116 ms

 8  tbr2-cl31.sffca.ip.att.net (12.122.12.133)  39.618 ms  39.392 ms  42.649 ms

 9  ggr3-ge90.sffca.ip.att.net (12.122.82.149)  38.219 ms  39.612 ms  37.818 ms

10  att-gw.sanfran.level3.net (192.205.33.78)  40.348 ms  40.684 ms  40.631 ms

11  ae-1-55.bbr1.SanJose1.Level3.net (4.68.123.129)  41.523 ms  45.727 ms  42.543 ms

12  as-3-0.bbr2.Washington1.Level3.net (4.68.128.206)  93.909 ms  88.618 ms  89.619 ms

13  ae-21-54.car1.Washington1.Level3.net (4.68.121.114)  254.379 ms ae-21-56.car1.Washington1.Level3.net (4.68.121.178)  90.171 ms ae-21-54.car1.Washington1.Level3.net (4.68.121.114)  140.029 ms

14  GOOGLE-INC.car1.Level3.net (4.79.228.38)  90.489 ms  93.916 ms  90.612 ms

15  66.249.95.149 (66.249.95.149)  95.703 ms 72.14.238.136 (72.14.238.136)  102.134 ms 66.249.95.149 (66.249.95.149)  95.495 ms

16  72.14.236.15 (72.14.236.15)  98.528 ms 216.239.47.1 (216.239.47.1)  95.767 ms 72.14.236.173 (72.14.236.173)  95.699 ms

17  216.239.49.222 (216.239.49.222)  102.050 ms 72.14.236.19 (72.14.236.19)  99.972 ms 216.239.49.222 (216.239.49.222)  102.520 ms

18  jc-in-f99.google.com (64.233.187.99)  110.628 ms *  96.815 ms

Looks fine. Does anyone have a clue why the UDP traceroute doesn't work?

daedalus

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