I get this error for a specific website, that they announced they made some changes a couple months ago. Now when I check it through c#.... something is not right. The other websites I check are working allright with this code.
Can someone elucidate it for me, please?
{ " The request was aborted: Could not create SSL/TLS secure channel." }
I am using this code:
// I google it and find this 3lines as being helpful - THEY ARE NOT HELPING AT ALL ServicePointManager.Expect100Continue = true ; ServicePointManager.DefaultConnectionLimit = 9999 ; ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls; // (In my VS2010, I only see Ssl3 and Tls,that's it - this may be the cause?) HttpWebRequest request; HttpWebResponse response = null ; Stream stream = null ; request = (HttpWebRequest)WebRequest.Create( " https://www.MyWebsiteToCheck.com/" ); request.UserAgent = " Foo" ; request.Accept = " */*" ; request.UseDefaultCredentials = true ; request.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials; // {"The request was aborted: Could not create SSL/TLS secure channel."} // and response is null. response = (HttpWebResponse)request.GetResponse(); // <<<here it breakes stream = response.GetResponseStream(); if (stream != null ) stream.Close(); if (response != null ) response.Close();
Thank you.
What I have tried:
................................................................................. // in .NET 4.0, TLS 1.2 is not supported, but if you have .NET 4.5 (or above) installed on the system // then you still can opt in for TLS 1.2 even if your application framework doesn't support it. // The only problem is that SecurityProtocolType in .NET 4.0 doesn't have an entry for TLS1.2, // so we'd have to use a numerical representation of this enum value: // ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072; ServicePointManager.SecurityProtocol = (SecurityProtocolType) 3072 ; // instead of: // ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls; So it was a .NET problem after all. Hmmm.
I am leaving this here with the result i find, maybe it will help others too. <pre>ServicePointManager.Expect100Continue = true ; ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11; Add this line
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
ServicePointManager.ServerCertificateValidationCallback = (snder, cert, chain, error) => true;
It working.

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