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PODuplex channel WCF from DMZ to Intranet
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copied!<p>We are running an dual channel service inside the domain. We have a TCP binding on port 20120 and a HTTP binding on port 20121.</p> <p>In the DMZ (web), we want to access this WCF service. Firewall seems to be open from the web to the service. Using telnet, i can access both ports and i am also able to browse the WSDL from a browser of web. now, when i try to do the connect to the service from the web application (it uses TcpBinding, and i cannot change it easly to HttpBinding without redeploying new binaries which is a painfull process), i get an exception.</p> <pre><code>System.ServiceModel.CommunicationException, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '00:00:59.9680000'. System.ServiceModel.Channels.StreamConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout) System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.SendPreamble(IConnection connection, ArraySegment`1 preamble, TimeoutHelper&amp; timeoutHelper) System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.DuplexConnectionPoolHelper.AcceptPooledConnection(IConnection connection, TimeoutHelper&amp; timeoutHelper) System.ServiceModel.Channels.ConnectionPoolHelper.EstablishConnection(TimeSpan timeout) System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout) System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout) System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct&amp; sig, MethodAttributes methodAttributes, RuntimeType typeOwner) System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) System.ServiceModel.Channels.ServiceChannelProxy.ExecuteMessage(Object target, IMethodCallMessage methodCall) System.ServiceModel.Channels.ServiceChannelProxy.InvokeChannel(IMethodCallMessage methodCall) System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message) System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData&amp; msgData, Int32 type) System.ServiceModel.ICommunicationObject.Open(TimeSpan timeout) System.ServiceModel.ClientBase`1.System.ServiceModel.ICommunicationObject.Open(TimeSpan timeout) ... </code></pre> <p>Our test environment was all intranet, so no DMZ. there it all works fine.</p> <p>Service itself is running as a domain user, and the client service behaviour has its userPrincipal configured (like username@domain.ext). does this need access to the domain controller of domain.exe ?</p> <p>I also enabled WCF logging on the service side, but nothing happens there. all is quite, like nothing happended there. Is there any other spot i missed to check why the connection drops.</p> <p>EDIT1: I wrote a little test program, that establishes the wcf connection and calls 2 methods. This works fine from the same machine as the service and from the dmz web as well. binding settings are the same. (confirmed that). I run the test as a local user from a normal console on th dmz web machine. any hints?</p>

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