Develop Reference

WCF NetTCPBinding in a Load Balanced Environment; what is the correct configuration?

I have been battling to resolve wcf issues on our production servers. One of the errors thrown is "The server rejected the upgrade request." among other weird errors I'm receiving. Our applications runs on the Citrix environment for the front end and our application servers host our WCF Services. We have two application servers set up for load balancing and this KEMP server supports sticky ip's since we are using nettcpbinding. However, I am not sure if we have configured our NetTCP settings correctly as the application frequently uses 100% CPU, when more than 5 users log onto an application. After an iisreset, it takes about an hour for this to re-occur. Please find below the configuration of the NETTcpBinding below:
<bindings>
<netTcpBinding>
<binding name="NetTcpLargeBindingEndpoint"
closeTimeout="00:05:00"
openTimeout="00:05:00"
receiveTimeout="00:15:00"
sendTimeout="00:15:00"
transactionFlow="false"
transferMode="Buffered"
transactionProtocol="OleTransactions"
hostNameComparisonMode="StrongWildcard"
maxBufferPoolSize="2147483647"
maxBufferSize="2147483647"
maxReceivedMessageSize="2147483647"
listenBacklog="10"
portSharingEnabled="false"
>
<reliableSession enabled="false"/>
<readerQuotas maxArrayLength="2147483647" maxStringContentLength="2147483647" />
<security mode="Transport">
<transport clientCredentialType="Windows" />
<message clientCredentialType="UserName" algorithmSuite="Default" />
</security>
</binding>
</netTcpBinding>
</bindings>
I have tried searching articles for the correct settings to have for nettcpbindng, but not luck and the most helpful is this msdn article:
https://msdn.microsoft.com/en-us/library/vstudio/hh273122(v=vs.100).aspx
Is there something I'm doing wrong in these settings? Please assist

Proxy on Http Bindings

I have a web application connects web service on a machine uses proxy server. Connections are ok on internet explorer as shown in image
And my web.config is:
<system.net>
<defaultProxy>
<proxy autoDetect="true" usesystemdefault="true"/>
</defaultProxy>
</system.net>
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="ProcessSoap" closeTimeout="00:01:00" openTimeout="00:01:00"
receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false"
useDefaultWebProxy="true" hostNameComparisonMode="StrongWildcard"
maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
>
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<security mode="None">
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://www.serveraddressthatiwanttoconnect.com/services/WebService.asmx"
binding="basicHttpBinding" bindingConfiguration="ProcessSoap"
contract="PINAlmaServis.ProcessSoap" name="ProcessSoap" />
</client>
I want to use system proxy settings, because it can change time to time. "kurumsalproxy" is a machine name on local network. I tried every potential variations for web.config on http://msdn.microsoft.com/en-us/library/kd3cf2ex.aspx but can not establish to connect.
Is there something that i miss?

I want to use system proxy settings
There is no “system” proxy settings. Every user owns personal proxy configuration. You could create a user with the proxy configuration and change app pool identity to use that account.
UPDATE: How to use the proxy used in Internet Explorer in an ASP.NET application

I don't think you need to change application pool identity, if you carefully read this server fault thread,
https://serverfault.com/questions/34940/how-do-i-configure-proxy-settings-for-local-system
You need to configure the proxy setting for system accounts (local system, local service, and network service) if your application pool identity is Network Service.

.NET C# Office Shared Add In WCF Service reference exception

I have created an office shared add in using Visual Studio 2010 .NET 4.0. This add in references a WCF service. When creating an instance of the WCF service client, i get the following exception:
Could not find default endpoint element that references contract 'Services.IBusinessLogicLayerMetaData' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this contract could be found in the client element.
I am not sure how to resolve this. My app.config looks like this:
<?xml version="1.0"?>
<configuration>
<system.serviceModel>
<bindings>
<wsHttpBinding>
<binding name="WSHttpBinding_IBusinessLogicLayerMetaData" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="1048576000" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" />
<security mode="None">
<transport clientCredentialType="Windows" proxyCredentialType="None" realm="" />
<message clientCredentialType="Windows" negotiateServiceCredential="true" />
</security>
</binding>
</wsHttpBinding>
</bindings>
<client>
<endpoint address="http://10.181.9.47:8000/DeutscheBank.WindowsServices.DataSOA/BusinessLogicLayerMetaDataService" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IBusinessLogicLayerMetaData" contract="Services.IBusinessLogicLayerMetaData" name="WSHttpBinding_IBusinessLogicLayerMetaData" />
</client>
</system.serviceModel>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
</configuration>

Hope this helps someone.
I resolved this issue by copying the add in config file and dll to the office directory. I also made a copy of the config file and renamed it to "OfficeApplication".exe.config.
"OfficeApplication" is the office app that you would like the add in to work with.

WCF Authentication Error

I'm accessing a third party WCF service (I have no access to the service configuration) We're using SSL certificates for the authentication.
I'm getting this error when trying to access to any of the provided methods
The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The
authentication header received from the server was 'Negotiate,NTLM
I checked many google links and no luck so far- No idea what else to check on my side.
EDIT
Here is the configuration
<system.serviceModel>
<bindings>
<wsHttpBinding>
<binding name="wsHttpBinding" closeTimeout="00:01:00" openTimeout="00:01:00"
receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false"
transactionFlow="false" hostNameComparisonMode="StrongWildcard"
maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true"
allowCookies="false">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<reliableSession ordered="true" inactivityTimeout="00:10:00"
enabled="false" />
<security mode="Transport">
<transport clientCredentialType="Windows" proxyCredentialType="None"
realm="" />
<message clientCredentialType="Windows" negotiateServiceCredential="true"
establishSecurityContext="true" />
</security>
</binding>
</wsHttpBinding>
</bindings>
<client>
<endpoint address="https://url"
binding="wsHttpBinding" bindingConfiguration="wsHttpBinding"
contract="IApiWS" name="wsHttpBinding">
</endpoint>
</client>
</system.serviceModel>

Try setting your clientCredentialType="Windows" to clientCredentialType="Certificate" I usually use hard-coded WCF config, not config file, so I'm not really sure on this, but either way, take a look at the following link: Selecting a Credential Type on MSDN.
Good luck. I'm surprised what/whom you're connecting to didn't give explicit endpoint connection instructions, but hey, you deal with every kind when working with 3rd-party stuff.

Ok, this may be a little vague so I aplogise in advance, essentially the server is telling you you are not authorised, normally for this you would add something like the below onto the proxy you generated
svc.ClientCredentials.Windows.AllowedImpersonationLevel = System.Security.Principal.TokenImpersonationLevel.Impersonation;
where svc is your generated proxy. I have also seen this on a misconfigured IIS hosted endpoint where the virtual folder does not have allow anonymous set (though you say you cannot access the service configuration so that may not be to helpful). hope this helps
edit added more info,
It may be, depending on security, that a setting similar to below may be more usefull
svc.ClientCredentials.Windows.AllowedImpersonationLevel = System.Security.Principal.TokenImpersonationLevel.Anonymous;
Edit 2
The config above shows that the wsHttpBinding you are using has Windows set as clientCredentialtype for the transport security and user authentication, this mean that you will be sending through the credentials of the currently logged on user to the service for authentication using NTLM (as negotiateServiceCredentials is true) have you confirmed that the user logged on has rights on the service?

VS2008 Crashes when adding a WCF service

I have a Console application hosting a WCF service:
Updated this code to run off the app.config file instead of initialising it programatically
Uri baseAddress = new Uri("http://localhost:8000/ChatServer/Service");
ServiceHost myHost = new ServiceHost(typeof(ClientServerChat.ChatServer), baseAddress);
myHost.AddServiceEndpoint(typeof(IChat), new WSHttpBinding(), "ChatService");
ServiceMetadataBehavior mb = new ServiceMetadataBehavior();
ServiceBehaviorAttribute attrib = (ServiceBehaviorAttribute)myHost.Description.Behaviors[0];
attrib.IncludeExceptionDetailInFaults = true;
mb.HttpGetEnabled = true;
myHost.Description.Behaviors.Add(mb);
myHost.Open();
The Console app compiles and runs. svcutil runs perfectly.
Svcutil runs against the new service code perfectly and generates the Client code and the ouput file
I'm calling svcutil via the Visual Studio Command Prompt like so: svcutil.exe http://localhost:8000/ChatServer/Service
It generates this output.config:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.serviceModel>
<bindings>
<wsHttpBinding>
<binding name="WSHttpBinding_IChat" closeTimeout="00:01:00" openTimeout="00:01:00"
receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false"
transactionFlow="false" hostNameComparisonMode="StrongWildcard"
maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true"
allowCookies="false">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<reliableSession ordered="true" inactivityTimeout="00:10:00"
enabled="false" />
<security mode="Message">
<transport clientCredentialType="Windows" proxyCredentialType="None"
realm="" />
<message clientCredentialType="Windows" negotiateServiceCredential="true"
algorithmSuite="Default" establishSecurityContext="true" />
</security>
</binding>
</wsHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost:8000/ChatServer/Service/ChatService"
binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IChat"
contract="IChat" name="WSHttpBinding_IChat">
<identity>
<userPrincipalName value="Bedroom-PC\Roberto" />
</identity>
</endpoint>
</client>
</system.serviceModel>
</configuration>
Along with the bundled client code (which is in the same directory as the output file, I should add) I should be able to call the service with this:
ChatClient client = new ChatClient();
The new output from svcutil (both code and config) still throws this exception.
But it throws an exception saying:
"Could not find default endpoint element that references contract 'IChat' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this contract could be found in the client element."
Interestingly, Visual Studio 2008 will crash when adding the same Service reference to a Client project.
VS2008 still crashes with the updated code.
It will find the service, get all the operations and what not. When I click Add, it crashes.
Any one have a clue whats going on??
Thanks in advance
Roberto

Have you tried using the configuration file setup rather than doing it programmatically? Then at least you'll know if it's a general settings problem or something to do with your code. You could then roll out the code bits one by one; mex, then endpoint and see which kills it.

I fixed it.
I copy and pasted the system.serviceModel section from output.config into app.config after the the userSettings section and commented out the entire output.config.
I also specified the name of the endpoint when inistializing ChatClient("name").
It seems to be working.

Does VS2008 just die without any feedback? If so, check windows event log (app log) for error messages.
One plausible cause: VS2008 + System.Core.dll 3.5 + bad NGen images can cause crashes when VS2008 tries to load either System.Core or anything that references/depends on it.
You may also want to attach one VS instance to another (as debugger) to see any additional crash details. But I would explore the System.Core/NGen track first.
https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=341658
https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=337149
https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=330302
https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=330903