question

Building out the iframe and charge cardToken on the sandbox in C# and localhost, the iframe works, the cardToken is returned, and the charge is made.

When it is deployed on the live server, the following error occurs:

"The request was aborted: Could not create an SSL/TLS secure channel."

I've seen this before and it is usually fixed by setting the TLS to TLS12 with:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

Local machine environment: Windows 10 Pro, .NET Framework 4.5, IIS version 10

Live server environment: Windows Server 2008 R2, .NET Framework 4.5, IIS version 8

[HttpPost]
public async Task<ActionResult> Charge(string cloverToken)
{
    string Message = "";

    try
    {
        // Amount in cents, change this to the actual amount

        int amount = 10000;

        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
        
        // Set up the request
        var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://scl-sandbox.dev.clover.com/v1/charges");
        httpWebRequest.ContentType = "application/json";
        httpWebRequest.Method = "POST";
        //private key-sandbox - Ecommerce API Tokens
        httpWebRequest.Headers["Authorization"] = "Bearer xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx";
                using (var streamWriter = new StreamWriter(await httpWebRequest.GetRequestStreamAsync()))
        {
            // Create the json object
            string json = $"{
                 {\"source\": \"{cloverToken}\", \"amount\": {amount}, \"ecomind\": \"ecom\", \"capture\": \"true\", \"currency\": \"USD\"}}";

            // Write the json object to the request stream
            streamWriter.Write(json);
        }

        // Get the response
        var httpResponse = (HttpWebResponse)await httpWebRequest.GetResponseAsync();
        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
        {
            // Read the response into a string
            var responseText = streamReader.ReadToEnd();
            Message = responseText;

            // TODO: Parse this response to handle success/failure appropriately.
        }
    }
    catch (Exception ex)
    {
        Message = "exception" + ex.Message;
    }


    return Json(Message);
}