403 errors trying access site on cloudflare through vercel mirror

[orh0]

What is the name of the domain?

i can not say

What is the error number?

403

What is the error message?

Веб-сайт недоступен через этот адрес. - The website is unavailable through this address.

What is the issue you’re encountering

Vercel is used as mirror (proxy on nextjs, updated yesterday) while our main domain is banned by russian rkn. old deployments show the same error

What steps have you taken to resolve the issue?

checked all security settings
saw no logs at all in security->events, completely no logs with query strings which I had to trigger

What are the steps to reproduce the issue?

open vercel mirror
see 403 error

Screenshot of the error

[sdayman]

That does not look like a Cloudflare block page. Please check with Vercel if it’s coming from them.

[orh0]

Here is another screenshot. Even old deployments on Vercel, leading to the old domain, have started receiving a block when trying to access the site via Cloudflare. This change in Cloudflare occurred just yesterday or today.

[orh0]

when trying to access the site via vercel*, sorry.

there are still no logs in security → events, even when i try to open different pages in case of cache, so it appears to be a block by Cloudflare, happening even before the request reaches my security settings.

[orh0]

This error is caused by “managed challenge” for amazon’s asn in security → waf → tools. But it’s very strange, because in none of the cases did I receive a single log that would indicate my rule was the cause.