https://community.developer.cybersource.com/t5/Integration-and-Testing/Unknown-SSL-protocol-error-in-connection-to-secure-authorize-net/m-p/28090#M14817 <P>The software that we have been using for 3 years and all of a sudden it is throwing this error.&nbsp; We have never seen this before.&nbsp; Is there an issue with the server or did something change??</P> Fri, 20 Jul 2012 21:28:03 GMT rfried498 2012-07-20T21:28:03Z https://community.developer.cybersource.com/t5/Integration-and-Testing/Unknown-SSL-protocol-error-in-connection-to-secure-authorize-net/m-p/28090#M14817 <P>The software that we have been using for 3 years and all of a sudden it is throwing this error.&nbsp; We have never seen this before.&nbsp; Is there an issue with the server or did something change??</P> Fri, 20 Jul 2012 21:28:03 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/Unknown-SSL-protocol-error-in-connection-to-secure-authorize-net/m-p/28090#M14817 rfried498 2012-07-20T21:28:03Z https://community.developer.cybersource.com/t5/Integration-and-Testing/Unknown-SSL-protocol-error-in-connection-to-secure-authorize-net/m-p/28134#M14839 <P>If your software is PHP using Curl, forcing SSLv3 may work for you. It solved the problem for me:</P><P>&nbsp;</P><PRE>curl_setopt($ch, CURLOPT_SSLVERSION, 3); // Force SSLv3 to fix Unknown SSL Protocol error</PRE><P>&nbsp;</P> Sun, 22 Jul 2012 20:25:06 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/Unknown-SSL-protocol-error-in-connection-to-secure-authorize-net/m-p/28134#M14839 cyclissmo 2012-07-22T20:25:06Z https://community.developer.cybersource.com/t5/Integration-and-Testing/Unknown-SSL-protocol-error-in-connection-to-secure-authorize-net/m-p/28424#M14976 <P>I am having this same problem and have found that it is the resulted of a recent upgrade to php that was performed by my host.</P><P>&nbsp;</P><P>The host provided me with avery similar snippet to the one that you used and my problem is that I cannot find a place to impliment it. I am using Joomla and VIrtuemart and after searching files for 2 days - I have stii not found the correct file(s). Where did you enter your code?</P> Wed, 01 Aug 2012 23:58:49 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/Unknown-SSL-protocol-error-in-connection-to-secure-authorize-net/m-p/28424#M14976 lmiksch 2012-08-01T23:58:49Z