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RE: /24s run amuck again
- From: Hank Nussbacher
- Date: Sun Jun 10 04:13:06 2001
At 14:10 09/06/01 -0400, Richard A. Steenbergen wrote:
Email sent to firstname.lastname@example.org, email@example.com,
firstname.lastname@example.org on Feb 8 - no response.
> 11371 307 Rhythms NetConnections
Email sent to: email@example.com, firstname.lastname@example.org, email@example.com,
firstname.lastname@example.org, email@example.com, firstname.lastname@example.org on June 4 - everyone responded
that the problem was forwarded to Exodus and from there it disappeared into
a black hole.
> 3491 651 CAIS Internet
DSL providers are becoming very bad about this. Someone pointed out to me
off list that CAIS had carved up PSI's /8 into over 500 /24s.
> 690 502 Merit Network
Well at least we don't have to go too far to find the guilty party. :P
> 18994 468 Global Crossing
> 15870 436 Global Center Frankfurt
> 18993 325 Global Crossing
Those are the GlobalCenter datacenters being converted into the Exodus
network. It looks like they are leaking a sizable number of /32s /30s etc,
and since its GBLX space I'm assuming its stuff that used to be aggregated
into a single announcement.
Basically, after having sent out dozens of emails over the past 6 months I
have come to the conclusion that there are a few out there that will fix
things when presented with the problem. But the vast majority either don't
have a clue, don't want to have a clue or couldn't give a damn that the
routing tables are increasing in size.
> There is no attempt to measure aggregation - that's the job of the
> CIDR Report. This simply looks at the prefix announced and if it is
> outside the above limits, it is counted. Makes very interesting
The one interesting pattern I noticed in the rampant /24 abuse was non-
contiguous announcements. It's likely that this kept them off the CIDR
Report and any other scans which only looked for contiguous announcements.
Richard A Steenbergen <email@example.com> http://www.e-gerbil.net/ras
PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)