Can't add SMP server to the internet gateway. Error: "Server certificate request failed. The underlying connection was closed: An unexpected error occurred on a send"

Products

• IT Management Suite
• Client Management Suite

Issue/Introduction

During installation of the cloud-enabled management internet gateway you are unable to add the Symantec Management Platform server to the list of servers and see the following error:

"Server certificate request failed. The underlying connection was closed: An unexpected error occurred on a send"

Cause

On the Symantec Management Platform the customer had disabled TLS 1.0 and TLS 1.1. They enabled the use of TLS 1.2 only by setting the registry key:

HKLM SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\tls 1.2\server\Enabled.

See following the article on Microsoft's web site located at: TLS/SSL Settings

Resolution

On the internet gateway server we added the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319 "SchUseStrongCrypto"=dword:00000001