Since the beginning of 2021 we have encountered two online orders and possibly a third, where the customer denies making the order and the httpd log seems to confirm that. In each case, the person made an order and a day or more later a second order was placed for the same item and carrying the same credit card information. Since everything looked valid and the delay bypassed our duplicate order check, the order was accepted. Some background: a customer can connect to our catalogue and move around untracked for as long as they want until they decide to place an order. At this point there is only one path to follow to enter address info, credit card, etc. This ends with a summary of the order and if they click to proceed, it POST's the server order processor with the relevant info causing the credit card to be charged and the order to be entered. In total 3 scripts must be processed in the correct order. I scanned for the customer's IP in the httpd access log in each case and found that when they made the valid order they were on our catalogue and followed the correct path to place the order, confirming it as expected. BUT, and here is what I am having trouble understanding, for the invalid order ONLY the last request was logged as received by httpd. It shows the correct source (ie the page that should have resulted in an order) yet that page does not show in the httpd log as having been served. In one case, NO other page was served to that customer on that day ahead of the received order, at least judging from IP addresses in use. So what I appear to be seeing is a replay from the Internet which I find hard to accept as real. Has anyone ever seen this before and if so what did they do to resolve it? The only other possibility that I can think of is that their browser cached the page and re-transmitted it. (a violation of the HTML standard I think for a form page). The environment is Apache 2.4.25 on Fedora using php-fpm. Thanks in advance and apologies for the length of this post. John --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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