(1) failure phenomenon:
1, with the new patch, you can not telnet windows server
prompt:
(2) Failure:
Typically, this error message is directed to prohibit network security Remote Desktop connection to the server congestion. However, this error message if the remote desktop server may also be configured as a secure connection using TLS and RDP client does not support the TLS connection attempt (on the source computer).
(3) The solution:
three types of secure connections in Windows Server 2008 R2 Remote Desktop:
Negotiation: This security method uses TLS 1.0 support if TLS, the server's identity is verified. If you do not support TLS, the server is not authenticated.
RDP Security Layer: This security method uses Remote Desktop Protocol encryption to help secure communications between the client computer and the server. If you choose this setting, the server is not authenticated.
SSL: This security method requires TLS 1.0 to authenticate the server. If you do not support TLS, you can not establish a connection to the server. This method is available only when a valid certificate is available.
To resolve this issue, change the RDP security layer to allow the use of Remote Desktop Protocol encryption for secure connections to remote desktop security on the remote desktop server. Steps are as follows:
1, start - "Administrative Tools -" Remote Desktop Services - "Remote Desktop Session Host Configuration
2, RD Session Host Configuration - "RDP-Tcp Right Properties -" to set the security layer is RDP Security Layer - Click OK.