Detecting what IP is used by your server when making a secure connection.
Download this file, unpack it and upload the curlip.php file to your webserver. Then access the file with your browser
On top of the page it should show the IP address your server is using on port 443, this IP can differ from the IP your server is using on port 80 (when for example you ping your domain).
Just run this once, in case you execute this script multiple times, you might run into an auto block on my server.
Testing if your server supports the TLS 1.2 protocol that is now required by most payment providers.
Download this file, unpack it and upload the test_tls12.php file to your webserver. Then access the file with your browser
You should be informed about the status of your connection on the shown page.