AWS ALB 522 response code

  • ALB works - security group allows 0.0.0.0/0 for ingress and egress, return a website

  • EC2 works - security group allows 0.0.0.0/0

  • CF throws 522, sometimes 521

  • SSL Flexible

  • DNS CNAME to ALB DNS

  • ALB got IDLE TIMEOUT set to 4000

    curl -vL

    • TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
    • TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
    • old SSL session ID is stale, removing
    • Connection state changed (MAX_CONCURRENT_STREAMS == 256)!
    522 Origin Connection Time-out

    522 Origin Connection Time-out


    cloudflare-nginx

Not sure what I can do here.

Hello,

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