We have a High-Availability System in the amazon Cloud. 2 PHP Backend Server, 2 Varnish-Cache Server, Fronted by an Elastic Loadbalancer and there are 20 Typo3 Microsites installed.
If we fill out a contact form and fire it up with Submit, the Browser take a short time and show me the form (with my data) again. It seems he is doing nothing. If I connect me again the PHP Webserver (Host-Entry) the From works fine. So I think it must be a problem with the Varnish and POST Requests.
Can anybody help me with it?
I attach you one of the default.vcl files with our current configuration.