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Re: Why are Cloudflare checking my browser?

Ben Ramsey <ben@benramsey.com> Thu, 27 February 2020 14:03 UTC

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From: Ben Ramsey <ben@benramsey.com>
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Subject: Re: Why are Cloudflare checking my browser?
Date: Thu, 27 Feb 2020 08:03:39 -0600
Message-Id: <EE05B8C5-10F6-4E71-A886-61F3D490F27E@benramsey.com>
References: <BC83D18D-7DEF-4769-A788-82D0AC8C888A@sinodun.com>
Cc: IETF Discussion <ietf@ietf.org>
In-Reply-To: <BC83D18D-7DEF-4769-A788-82D0AC8C888A@sinodun.com>
To: John Dickinson <jad@sinodun.com>
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> On Feb 27, 2020, at 04:27, John Dickinson <jad@sinodun.com> wrote:
> 
> Hi,
> 
> Maybe I missed an announcement but please could someone explain why I am seeing:
> 
> Checking your browser before accessing ietf.org.
> 
> This process is automatic. Your browser will redirect to your requested content shortly.
> Please allow up to 5 seconds…
> DDoS protection by Cloudflare
> Ray ID: 56b9671cdc01e608
> 
> whilst going to an ietf mailman page?
> 
> What is Cloudflare checking for? What is Cloudflare’s privacy policy for this “service”?
> 
> BTW the link https://www.cloudflare.com/5xx-error-landing?utm_source=iuam shown as the text “DDoS protection by Cloudflare” doesn’t provide any explanation.


I’ve noticed this recently on a lot of other Cloudflare-backed websites. I wonder if they’re mitigating a large-scale DDoS attack, or something like that?

Cheers,
Ben

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