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

[Jay Borkenhagen <jayb () att com>]

Hi Chris,

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.

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.

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