I left them a comment on there blog post about this topic, where I'm way nicer than in this ranty-thread. The blog post can be found here https://blog.cloudflare.com/is-bgp-safe-yet-rpki-routing-security-initiative/
My comment still waits for improvement from there moderation team.
The behavior of Cloudflare is unacceptable. Since they do the finger pointing they should implement there check for IPv4 and IPv6 separated to not do unfounded accusation.
Also they should praise the ones which implemented RPKI already for IPv6 but still figure out when and how to do the same for IPv4
Also, some ISPs already implemented RPKI for IPv6 but struggle to switch it on for IPv4 since they don't want to break there service for there customers. Especially in the time of a crisis.
So Cloudflare created a website to put pressure on ISPs to adopt RPKI, which is called https://isbgpsafeyet.com.
In general, I like this idea, but they just implemented it half the way.
In my case: I use two ISPs, one for IPv4 without RPKI and one for IPv6 with RPKI. Now they tell me that the provider for IPv6 doesn't have RPKI implemented. This happens because Cloudflare did not implement separated checks for IPv4 and IPv6
Maybe they are afraid there messages could be interpreted as a kind of April fool
network engineer, mostly maintaining personal layer 8
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