Hello all, I have problem with WCF service authenticating. Please, take a look at the following code: ProductsServiceClient proxy = new ProductsServiceClient("NetTcpBinding_IProductsService"); proxy.ClientCredentials.Windows.ClientCredential.Domain = "DAGREGI"; proxy.ClientCredentials.Windows.ClientCredential.UserName = "Bert"; proxy.ClientCredentials.Windows.ClientCredential.Password = "Pa$$w0rd"; ProductsServiceClient is a ServiceContract. If I comment out three lines with credential info, everything is fine. In other case I received following exception: SOAP security negotiation with 'net.tcp://localhost:8083/TcpProductsService' for target 'net.tcp://localhost:8083/TcpProductsService' failed. See inner exception for more details. Inner exception: System.ServiceModel The message or signature supplied for verification has been altered Example is taken directly from WCF Step By Step book, and it should be working. I have no idea what is wrong. If you need some more information, please let me know. Thanks! -- Gregi
