Cloudfalare prevent Authorize.net return status page (thank you page)


#1

Running magento 2.2.6 under cloudeflare.
I can post credit card transaction to Authorize.net and it and it will be successful yet I’m not getting response status from Authorize.net. I belive cloudflare somehow prevents their response and magento doesn’t know what to display - thank you page or payment failed. Please advise.
Site in question https://www.usawheelchair.com/


#2

Solution found
Direct post MD5 should be less than 20 char. (normally it’s about 30 so just chop it)
Don’t thank me )) … what an idiots