Hi
Well I did have WP Super Cache running for a year before any of these issues started happening.
If you notice another recent post I did state that Cloudflare is a reverse proxy so share IP addresses. I am wondering whether that causes issues as multiple users could have the same IP when accessing the site or making payments or even PayPal hitting the site.
I have now installed the module that "returns" the original users IP to the access logs so I will see if the blip in the summer was caused by me installing Cloudflare BUT not this module.
Also there is a sub domain e.g ignore.mysite.com which means all requests bypass cloudflare altogether. This is setup by default when you set Cloudflare up.
Therefore I am wondering whether key requests to PayPal or others should be using this "bypass" Cloudflare URL to make those requests to prevent any caching by this reverse proxy.
More and more people are using Cloudflare as it's free and you can block whole country IP ranges, speed up sites with minification and "aysnc" or "rocketscript" as they call it added to scripts/css and other cool features.
Therefore maybe it is something S2 should look at to see if it would cause any problems so they can add notes to the others on Amazon and other 3rd party tools AND maybe to their http://www.mysite.com/wp-content/plugins/s2-server-scanner.php tool to scan and see if it could cause potential problems.
Just thinking ahead as I know more and more people are using the tool and if this problem is fixed by me restoring the original IPs rather than the Clouflare proxy IPs then this could be added to your tests and notes / Knowledgebase etc.
I will let you know if it does fix anything.
Thanks
Rob
