Okay, then telnet is not there on your machine. As you have mentioned that many users are facing the same issue, may be you can check if any one has telnet on their machine to test this approach.
@AnandVyas I found below message using telnet at command prompt.
Find the picture. Error Message says that Access Denied for both Test and Production servers. But PC SAS is having issues only with Production server, Test server is running smoothly.
The SAS Users Group for Administrators (SUGA) is open to all SAS administrators and architects who install, update, manage or maintain a SAS deployment.