SecurityNegotiationException: SSPI call failed

Question

I have a WCF web service using NetTcpBinding with transport security, and clientCredientialType is none . I do not have the identifier specified on the endpoint using this binding. Each attempt to call a method in a service results in the following error:

Client side:

System.ServiceModel.Security.SecurityNegotiationException: SSPI call failed, see Internal Exception.

Service sector:

System.ServiceModel.Security.SecurityNegotiationException: Authentication failed on the remote side (possibly a thread available for additional authentication attempts).

System.ComponentModel.Win32Exception: target base name is invalid

Any help with this is appreciated

thanks

Sj