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“AS396531 "Allegheny Technologies Incorporated" is leaking a better-reachable route for AS13335 "Cloudflare, Inc." towards AS701 "Verizon Business/UUnet" explai

“AS396531 "Allegheny Technologies Incorporated" is leaking a better-reachable route for AS13335 "Cloudflare, Inc." towards AS701 "Verizon Business/UUnet" explaining the current LSE going on.” https://twitter.com/OhNoItsFusl/status/1143117619106652160 https://twitter.com/OhNoItsFusl/status/1143117619106652160

jgrahamc 7y ago
They aren't the original leaker. Update: sorry, I may have been wrong. Hard to see clearly in the fog of BGP.
- q3k 7y ago
  Can you elaborate?
  - jcalabro 7y ago
    Seconded. I've received notices from multiple carriers that ASN 396531 is the root cause of the leak.
mbell 7y ago
> AS396531 - Allegheny Technologies Incorporated That appears to be a steel/alloys company. Why are they operating BGP equipment?
- bin0 7y ago
  Any company which operates large factories probably has its own ASN and runs its own networks. Every thing's gotta be internet-enabled these days, and at a certain scale, it becomes cost-effective.
- Hikikomori 7y ago
  Why not? Pretty much everyone that needs a redundant internet connection (dual ISP) does it.
  - mbell 7y ago
    > Why not? It seems silly to me that an end user company not providing any network services which only has a 256 IP block has the ability to break a significant portion of the internet with a configuration mistake. There are several ways to setup dual ISPs and routing that don't involve such risk.
    - wbl 7y ago
      You need BGP and provider independent space for your two ISPs to both announce your space. What's the alternative approach?
      - mbell 7y ago
        Don't rely on a single IP routing through multiple ISPs, use DNS.
        kazen44 7y ago
        what? this statement makes no sense from a networking perspective. thisissue still exists if you break up your IP space, it just makes it far harder to manage.
  - jaziek 7y ago
    Most places that are just doing it for that reason won't be advertising anything other than their own /24 or whatever though. You have to fuck up pretty spectacularly (and have your upstream providers do the same) to be able to accomplish what has happened here.
- steveklabnik 7y ago
  Pittsburgh is a town that (used to be) run by steel. Even a few decades after that dominance, this particular company is still a $4B one on the S&P 400. I'm pretty sure this is the company that my grandfather worked at for decades; his brother did from high school to retirement (except during World War II). They apparently significantly polluted the air in the high school district next to mine ten years ago. It doesn't surprise me at all that they are still a part of infrastructure, somehow.

jgrahamc 7y ago

They aren't the original leaker. Update: sorry, I may have been wrong. Hard to see clearly in the fog of BGP.

q3k 7y ago
Can you elaborate?
- jcalabro 7y ago
  Seconded. I've received notices from multiple carriers that ASN 396531 is the root cause of the leak.

mbell 7y ago

> AS396531 - Allegheny Technologies Incorporated That appears to be a steel/alloys company. Why are they operating BGP equipment?

bin0 7y ago
Any company which operates large factories probably has its own ASN and runs its own networks. Every thing's gotta be internet-enabled these days, and at a certain scale, it becomes cost-effective.
Hikikomori 7y ago
Why not? Pretty much everyone that needs a redundant internet connection (dual ISP) does it.
- mbell 7y ago
  > Why not? It seems silly to me that an end user company not providing any network services which only has a 256 IP block has the ability to break a significant portion of the internet with a configuration mistake. There are several ways to setup dual ISPs and routing that don't involve such risk.
  - wbl 7y ago
    You need BGP and provider independent space for your two ISPs to both announce your space. What's the alternative approach?
    - mbell 7y ago
      Don't rely on a single IP routing through multiple ISPs, use DNS.
      - kazen44 7y ago
        what? this statement makes no sense from a networking perspective. thisissue still exists if you break up your IP space, it just makes it far harder to manage.
- jaziek 7y ago
  Most places that are just doing it for that reason won't be advertising anything other than their own /24 or whatever though. You have to fuck up pretty spectacularly (and have your upstream providers do the same) to be able to accomplish what has happened here.
steveklabnik 7y ago
Pittsburgh is a town that (used to be) run by steel. Even a few decades after that dominance, this particular company is still a $4B one on the S&P 400. I'm pretty sure this is the company that my grandfather worked at for decades; his brother did from high school to retirement (except during World War II). They apparently significantly polluted the air in the high school district next to mine ten years ago. It doesn't surprise me at all that they are still a part of infrastructure, somehow.