On 8/11/25 14:00, Miller, Jon via NANOG wrote:
We are seeing multiple Cloudflare sites blocked on our Cogent circuits. Three Cogent circuits from two clients in two states are blocked. I opened a ticket with Cogent, but the last time this happened, they just shrugged and said "not our fault." Are any other Cogent customers seeing this? Any advice on how to resolve? Here are the sites we see blocked by Cloudflare.
Cogent is a carrier; are they dropping transit from them or just blocking on AS path or IP? Are you using Cogent IP space? Are you single homed to Cogent? If those questions are yes, then your only real option is to reach out to the service providers who are using cloudflare and ask them to resolve the issue with their service provider. It's a bad idea to be single homed to any one upstream; Cogent is why we say this.
Jon Miller Bose McKinney & Evans LLP
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This is BS. I cite the link in the footer.
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