Re: schein.debian.org

Henrique de Moraes Holschuh <[email protected]> writes:

> On Wed, 01 Jun 2011, Gerald Turner wrote:
>> Henrique de Moraes Holschuh <[email protected]> writes:
>>  $ tracepath6 schein.debian.org
>>   1?: [LOCALHOST]                        0.031ms pmtu 1480
>>   1:  shub-niggurath.unzane.com                             0.162ms
>>   1:  shub-niggurath.unzane.com                             0.360ms
>>   2:  gturner-1.tunnel.tserv14.sea1.ipv6.he.net             6.576ms
>>   3:  gige-g2-6.core1.sea1.he.net                           5.654ms
>>   4:  10gigabitethernet9-1.core1.sjc2.he.net               26.522ms
>>   5:  10gigabitethernet3-2.core1.pao1.he.net               34.657ms
>>   6:  he.pao1.isc.org                                      29.855ms
>>   7:  int-0-0-0.r1.sjc3.isc.org                            31.418ms asymm 5
>>   8:  schein.debian.org                                    27.519ms reached
>>       Resume: pmtu 1480 hops 8 back 59
>
> 8 hops to get to shein, and *59* hops to get back?!
>
> That path is hopelessly broken.  In fact, this is so weird I'd guess
> something is screwing up the TTL fields in the way.
>

Wow.  I tried a tool at SiXXS to tracreoute between various PoPs of
theirs to my hosts running on a Hurricane Electric tunnel.  Hops look
reasonable (average 9 hops and under 50ms latency).

  https://www.sixxs.net/tools/traceroute/

> Set the TTL to packets directed to shein to 250, and check what
> happens.  I think you can do that adding a explicit route (via your
> default gateway) and forcing the TTL, using "ip route add".
>

I don't believe this can be done with 'ip route' - ttl parameter only
exists for 'ip tunnel'.

> At this point, we really should get someone that can login in shein to
> do a reverse tracepath to your IP...
>

I contacted [email protected], hope that was appropriate.

-- 
Gerald Turner   Email: [email protected]   JID: [email protected]
GPG: 0xFA8CD6D5  21D9 B2E8 7FE7 F19E 5F7D  4D0C 3FA0 810F FA8C D6D5

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