Re: AS4134/AS4847 - Appear to be hijacking some ip space.

[Christopher Morrow <morrowc.lists () gmail com>]

On Fri, Apr 5, 2019 at 12:29 PM Jay Borkenhagen <jayb () att com> wrote:
> Hi Chris,

yes!

> It would be great if the Google Fiber / AS16591 folks could publish a
> ROA in ARIN's hosted RPKI authorizing exactly 136.32.0.0/11 to be
> originated only in AS16591.  That ROA would have addressed this matter
> from AS7018's point of view.

ok, cool. This is sort of on my plate, at least from the internal
viz/evangelizing perspective, and I'll go spend time chatting up the
folk in fiber-land.
having a: "See, doing this would prevent this" is helpful.

> In the interim, I have added a temporary whitelist (slurm) entry into
> our RPKI caches, causing the AS7018 network to disregard the
> more-specific /24s under 136.32.0.0/11.

thanks!

> Good luck.
>                                                 Jay B.
>
>
> Christopher Morrow writes:
>  > Howdy gentle folks:
>  >
>  > It looks like AS4847 - "China Networks Inter-Exchange"
>  >
>  > Is taking some time to announce reachability for at least:
>  >   136.38.33.0/24
>  >
>  > which they ought not, given that this /24 is part of a /11 assigned to
>  > AS16591 (google fiber)... Looking at routeviews data, I see the
>  > following as-paths for this one /24:
>  > $ grep -A1 Refresh /tmp/x | grep 4847
>  >   1239 174 4134 4847
>  >   3549 3356 174 4134 4847
>  >   701 174 4134 4847
>  >   4901 6079 3257 4134 4847
>  >   20912 174 4134 4847
>  >   1221 4637 4134 4847
>  >   1351 11164 4134 4847
>  >   6079 1299 4134 4847
>  >   6079 3257 4134 4847
>  >   7018 4134 4847
>  >   6939 1299 4134 4847
>  >   3561 209 4134 4847
>  >   3303 4134 4847
>  >   3277 39710 9002 4134 4847
>  >   2497 4134 4847
>  >   4826 1299 4134 4847
>  >   54728 20130 23352 2914 4134 4847
>  >   19214 3257 4134 4847
>  >   101 101 11164 4134 4847
>  >   1403 6453 4134 4847
>  >   852 6453 4134 4847
>  >   1403 6453 4134 4847
>  >   286 4134 4847
>  >   3333 1273 4134 4847
>  >   57866 3491 4134 4847
>  >   3267 1299 4134 4847
>  >   49788 174 4134 4847
>  >   53767 3257 4134 4847
>  >   53364 3257 4134 4847
>  >   8283 57866 3491 4134 4847
>  >   7660 2516 4134 4847
>  >
>  > >From that I think the following AS should have filtered this prefix and are not:
>  > $ grep -A1 Refresh /tmp/x | grep 4847 | sed 's/ 4134 4847//' | awk
>  > '{print $NF}' | sort -n | uniq
>  >
>  > 174  - Cogent
>  > 209 - Qwest
>  > 286 - KPN
>  > 1273 - Vodafone
>  > 1299 - Telia
>  > 2497 - IIJ
>  > 2516 - KDDI
>  > 2914 - NTT
>  > 3257 - GTT
>  > 3303 - Swisscom
>  > 3491 - PCCW
>  > 4637 - Telstra
>  > 6453 - TATA
>  > 7018 - ATT
>  > 9002 - RETN
>  > 11164 - Internet2
>  >
>  > It'd be great if the listed folk could filter AS4134 :)
>  >
>  > -Chris