Ben,

Compromised as in a nefarious entity went into the router and changed passwords and did whatever.  Everything advertised by that comprised router is bogus.  The compromised router is owned by OrgID: S2NL (now defunct).  AS 36471 belongs to KDSS-23.  The compromised router does not belong to Kratos KDSS-23, and is causing routing problems.  The compromised router needs to be shut down.  The owner of the compromised router ceased business, and there isn't anyone around to address this at S2NL.  The only people that can resolve this is Cogent.   Cogent's defunct customer's router was compromised, and is spewing out bogus advertisements. 

Pete

--
Pete
Stage2 "Survivor Island" Bronze Medal Winner

On 7/20/23 10:40, Ben Cox wrote:

Can you confirm what you mean by compromised here?

The prefixes currently (as far as I can see from bgp.tools) originated are:

Prefix                   Description
209.255.244.0/24 Windstream Communications LLC
209.255.245.0/24 CONSOLIDATED TECHNOLOGIES INC 325 HUDSON
209.255.246.0/24 Windstream Communications LLC
209.255.247.0/24 CONSOLIDATED TECHNOLOGIES INC 325 HUDSON
216.197.80.0/20 --

The 209.xx have valid RPKI certs, so they seem validish, but all have
RADB IRR entries made by lightower.com in 2015.

Do you mean that someone has impersonated AS36471 and set up a cogent
port, and is now announcing your space? I'm confused

On Thu, Jul 20, 2023 at 3:32 PM Pete Rohrman
<prohrman@stage2networks.com> wrote:

NANOG,

A customer of Cogent has a compromised router that is announcing
prefixes sourced from AS 36471.   Cogent is propagating that to the
world.  Problem is, those prefixes and AS don't belong to that customer
of Cogent - AS 36471 belongs to Kratos Defense & Security Solutions,
Inc. (see whois).

Requests to Cogent Support and Abuse go un-actioned.  Need a contact at
Cogent Abuse that can shut down that compromised router.  Anyone have a
good contact at Cogent Abuse Dept?

Cogent ticket: HD302928500

Pete

--
Pete
Stage2 "Survivor Island" Bronze Medal Winner