Problem with self hosted


I just migrated my forum to Cloudflare CDN but started experimenting a bad behavior with my actual image conversion setup.

I have image conversion tool in one domain from where I convert my images vía URL parameter. The problem is when I migrated one page that is client of this system to cloudflare, started receiving errors. On Nginx log (I use proxy pass)

2019/12/10 23:05:56 [crit] 32358#0: *293130 connect() to [2606:4700:30::6818:62c6]:443 failed (99: Cannot assign requested address) while connecting to upstream, client:, server: images.weserv.local, request: “GET /?url= HTTP/1.1”, upstream: “https://[2606:4700:30::6818:62c6]:443”, host: “images.weserv.local”, referrer: “

Then in my browser I get different errors:
{“status”:“error”,“code”:404,“message”:“The requested URL returned error: 301”}

{“status”:“error”,“code”:404,“message”:“The hostname of the origin is unresolvable (DNS) or blocked by policy.”}

Other times it works. I can change the last pass of the URL to avoid cache (keeping the number) for unlimited tries so may be 70% fails 30% works.

Maybe you can help me with this poltergeist, I really appreciate your help.

Hi there,

Official support for is offered on the GitHub-page. But to answer your question: please check your IPv6 settings, or disable it completely in your config by adding ipv6=off like this:

resolver ipv6=off;

Have fun!

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