Re: Spamhaus vs. Cloudflare

[Matt Vernhout via NANOG <nanog () lists nanog org>]

Seems to be a Cloudflare issue.

Radioactive network: About the DROP list

Don't Route Or Peer (DROP) lists the worst of the worst IP traffic. It is
an advisory “drop all traffic”, containing IP ranges which are so dangerous
to internet users that Spamhaus provides access to anyone who wants to add
this layer of protection, free of charge.

~ Matt


On Thu, Sep 17, 2026 at 4:36 PM Seth Mattinen via NANOG <
nanog () lists nanog org> wrote:

> Cloudflare has IP ranges all the way up on the Spamhaus DROP list.
> Cloudflare says they cannot control this.
>
> 172.70.206.0/23 (Spamhaus SBL687772) 512 addresses
> 172.70.214.0/23 (Spamhaus SBL687314) 512 addresses
>
> Is Cloudflare in a "might makes right" position, or should someone be
> working to resolve the issues causing the SBL?
>
> ~Seth
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