Strange traceroute result to VM in EC2, Singapore

Sat Aug 8 02:54:12 UTC 2015

Traceroute on Linux/Unix boxes is generally using UDP by default. Try
using ICMP, by adding the -I (capital i) option to traceroute:

traceroute -I 52.74.124.136

On Fri, Aug 7, 2015 at 2:05 AM, Glen Kent <glen.kent at gmail.com> wrote:
> I find this bizzare because even when the traceroute doesnt work, I am
> actually able to ping and access the machine.
>
> I know that the VM responds to traceroutes, since it did respond to my
> traceroute when i was on the other broadband network.
>
> So i really fail to understand why the traceroute on the other network
> failed.
>
> Any pointers on this would be very helpful.
>
> Thanks, GLen
>
> On Thu, Aug 6, 2015 at 8:53 PM, Glen Kent <glen.kent at gmail.com> wrote:
>
>> Really sorry. Didnt realize that this is a text-only forum.
>>
>> When my traceroute to 52.74.124.136 works:
>>
>> ~$ traceroute 52.74.124.136
>> traceroute to 52.74.124.136 (52.74.124.136), 30 hops max, 60 byte packets
>> 1 xxxxxxx xxxxxxx 0.412 ms 0.472 ms 0.439 ms
>> 2 xxxxxxx xxxxxxx 2.98 ms 2.971 ms 2.999 ms
>> 3 xxxxxxx xxxxxxx 5.345 ms 5.546 ms 5.519 ms
>> 4 xxxxxxx xxxxxxx 3.172 ms 3.051 ms 3.010 ms
>> 5 if-6-2.tcore2.SVW-Singapore.as6543.net (180.87.37.14) 56.751 ms 56.285
>> ms 54.592 ms
>> 6 180.87.15.206 (180.87.15.206) 73.468ms 66.993 ms 66.734 ms
>> 7 203.83.223.58 (203.83.223.58) 43.737 ms 43.513 ms 44.029 ms
>> 8 203.83.223.15 (203.83.223.15) 47.239 ms 46.382 ms 203.83.223.74
>> (203.83.223.74)  44.144 ms
>> 9 203.83.223.231 (203.83.223.231) 44.431 ms 203.83.223.233
>> (203.83.223.233)  45.699 ms 46.158 ms
>> 10 ec2-52-74-124-136.ap-southeast-1.compute.amazon.com (52.74.124.136)
>>  44.067 ms 43.492 ms 43.499 ms
>>
>> When it doesnt:
>>
>> ~$ traceroute 52.74.124.136
>> traceroute to 52.74.124.136 (52.74.124.136), 30 hops max, 60 byte packets
>> 1 xxxxxxx xxxxxxx 23.272 ms 25.011 ms 26.072 ms
>> 2 xxxxxxx xxxxxxx 27.058 ms 28.971 ms 29.999 ms
>> 3 xxxxxxx xxxxxxx 33.025 ms 33.996 ms 38.822 ms
>> 4 p38895.sgw.equinix.com (202.79.197.87) 78.964 ms 60.051 ms 83.010 ms
>> 5 203.83.223.4 (203.83.223.4) 63.682 ms 64.610 ms 65.837 ms
>> 6 203.83.223.17 (203.83.223.17) 67.271 ms 203.83.223.23 (203.83.223.23)
>> 68.521 ms 203.83.223.17 (203.83.223.17) 70.526 ms
>> 7 203.83.223.233 (203.83.223.233) 71.624 ms 72.805 ms 74.471 ms
>> 8 * * *
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