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Re: New on RIPE Labs: The Curious Case of 128.0/16
From: Chris Adams <cmadams () hiwaay net>
Date: Tue, 6 Dec 2011 09:38:31 -0600

Once upon a time, Mirjam Kuehne <mir () ripe net> said:
Dear colleagues,

Related to the discussion about 128.0/16, we did some measurements. The 
details can be found on RIPE Labs:

https://labs.ripe.net/Members/emileaben/the-curious-case-of-128.0-16

Kind regards,
Mirjam Kuehne
RIPE NCC

Using RIPE's traceroute web interface, I can see that Sprint is
filtering 128.0.0.0/16:

from 128.0.0.1
traceroute to 216.180.54.1 (216.180.54.1), 30 hops max, 40 byte packets
 1  gw.nik-guest.nikrtr.ripe.net (193.0.0.234)  0.803 ms  1.005 ms  1.061 ms
 2  ams16-core-1.gigabiteth8-1-0.swip.net (195.69.145.139)  0.551 ms  0.466 ms  0.641 ms
 3  ams-core-1.tengige0-0-0-6.tele2.net (130.244.49.198)  3.378 ms  3.467 ms  3.624 ms
 4  nyc9-core-1.pos8-0-0.tele2.net (130.244.218.214)  76.618 ms  76.683 ms  76.746 ms
 5  * * *

from 193.0.0.232
traceroute to 216.180.54.1 (216.180.54.1), 30 hops max, 40 byte packets
 1  gw.nik-guest.nikrtr.ripe.net (193.0.0.234)  0.466 ms  0.514 ms  0.608 ms
 2  ams16-core-1.gigabiteth8-1-0.swip.net (195.69.145.139)  0.684 ms  0.581 ms  0.563 ms
 3  ams-core-1.tengige0-0-0-6.tele2.net (130.244.49.198)  3.890 ms  3.919 ms  3.912 ms
 4  nyc9-core-1.pos8-0-0.tele2.net (130.244.218.214)  76.292 ms  76.317 ms  76.304 ms
 5  144.223.26.73 (144.223.26.73)  76.639 ms  76.475 ms  76.511 ms
(and on to my IP)

I believe that Sprint is using Cisco, not Juniper.  This is either a
manual filter or there is another (unidentified) issue with some Cisco
configurations.

I've opened a ticket with Sprint, although I don't know how far it will
go, since I'm getting a MySQL syntax error trying to view the ticket in
their web interface (somebody must not understand SQL injection security
issues).

-- 
Chris Adams <cmadams () hiwaay net>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.


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