Cant 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.

"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: https://technet.microsoft.com/en-us/library/dn786418.aspx

Resolution

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

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

See https://technet.microsoft.com/en-us/library/security/2960358.aspx