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Event ID: 36874 Source: Schannel

Source
Level
Description
An SSL connection request was received from a remote client application, but none of the cipher suites supported by the client application are supported by the server. The SSL connection request has failed.
Comments
 
EV100573 (Why Schannel EventID 36888 / 36874 Occurs and How to Fix It) blog post provides some suggestions on how to fix this issue.
EV100490 (SChannel Errors on SCOM Agent) indicates a situation where this event is generated due to a incompatibility between TLS 1.2 and SHA 512 (Secure Hash Algorithm, a cipher suite component used for ensuring data integrity).
From a newsgroup post: "The error message is expected when a client is using unaccepted cipher bits, or  some crypto protocols has been disabled/unsupported on your server and a client is asking to use one of them. Have you disabled something like PCT in registry? Look at the following articles: ME241447, ME245030, and ME260729".
As per Citrix Document ID: CTX172208, both the client and server must be capable of 128-bit encryption in order to connect through Citrix Secure Gateway. To resolve this issue, install Windows 2000 Service Pack 2 on the Citrix Secure Gateway server, and ensure that the client machine has either Windows 2000 Service Pack 2 or the High Encryption Pack for Windows. See Citrix Document ID: CTX172208 for more details.

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