Tentacle ERROR Client failed authentication

I can no longer visit http://localhost:10933 or get my Tentacle to communicate with our OD server. Port 10933 is being used. Firewall is not blocking this inbound or outbound. Was working before I attempted to install an agent for a security SaaS we are using. This agent works fine on other servers with the same configuration. I have since uninstalled this agent since it was unable to communicate to it’s server which gave me my first sign that something wasn’t working. Windows Server 2012 R2 with IIS.

This is repeated over and over in Octopus’s log file.

2016-02-23 18:07:39.9110 12 ERROR Client failed authentication
System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. —> System.ComponentModel.Win32Exception: The client and server cannot communicate, because they do not possess a common algorithm
— End of inner exception stack trace —
at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, Exception exception)
at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
at Pipefish.Transport.SecureTcp.Server.SecureTcpServer.ExecuteRequest(TcpClient client) in y:\work\3cbe05672d69a231\source\Pipefish.Transport.SecureTcp\Server\SecureTcpServer.cs:line 112

Hi Joshua,

I’ve just answered your email with the same question. Lets continue our conversation over there.

Closing this ticket