I don’t think that will solve the problem IMO. I’ve seen people with similar problems still having an issue.
Now here is a new wrinkle which might be useful for anyone in similar situation.
I am using an EC2 machine with AWS for my server, but by happenstance I have a few static IPs and servers of my own, so for grins I moved my software to one of these servers, switched cloudflare DNS to point to new server, and the problem disappeared. As another experiment I reset my AWS instance so it assigned me a new IP (maybe the IP I had was labelled somewhere as spammer), that didn’t fixed.
So running on AWS, intermittent 521’s (suddenly. worked before). move off AWS and no problem. Leads me to think:
-Maybe AWS is throttling me because somehow it thinks some cloudflare IPs are spammy.
-My AWS firewall settings (security groups) have gone wacky or something changed there. But eyeballing them shows port 80 and 443 open (along with some others).
-Maybe there’s an internal problem with either CF or amazon reaching my zone there (like maybe one of their servers is offline, but you’d think it would be fixed up by now)
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