My clients in The Netherlands (connecting to servers in The Netherlands) suddenly get random 521 errors from Hamburg. All my servers are online. Why is traffic from NL routed via DE? What causes these random 521 errors?
521 errors usually refer to your origin server being down/unresponsive
My mistake, my fail2ban-client somehow blocked some of CF’s IPs.
This topic was automatically closed after 14 days. New replies are no longer allowed.