To check if you have hardcoded an earlier version of TLS in your APC or Callback follow the below instructions.
Step 1 – Open your Nochex APC or Callback page
Step 2 – Find one of the following lines
VB.net – Net.ServicePointManager.SecurityProtocol = 768
C# – ServicePointManager.SecurityProtocol = (SecurityProtocolType)768;
PHP Curl – curl_setopt ($ch, CURLOPT_SSLVERSION, 4);
If you have found one of the above lines in your APC or Callback page
go to step 3 otherwise No action is required.
Step 3 – Update the hardcoded values above to the following;
VB.net – Net.ServicePointManager.SecurityProtocol = 3072
C# – ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
PHP Curl – curl_setopt ($ch, CURLOPT_SSLVERSION, 6);
Step 4 – Save all changes and Test your APC or Callback pages to make sure everything is still working