WCF Fails when using impersonation over 2 machine boundaries (3 machines)
- by MrTortoise
These scenarios work in their pieces. Its when i put it all together that it breaks.
I have a WCF service using netTCP that uses impersonation to get the callers ID (role based security will be used at this level)
on top of this is a WCF service using basicHTTP with TransportCredientialOnly which also uses impersonation
I then have a client front end that connects to the basicHttp.
the aim of the game is to return the clients username from the netTCP service at the bottom - so ultimatley i can use role based security here.
each service is on a different machine - and each service works when you remove any calls they make to other services when you run a client for them both locally and remotley. IE the problem only manifests when you jump accross more than one machine boundary.
IE the setup breaks when i connect each part together - but they work fine on their own.
I also specify
[OperationBehavior(Impersonation = ImpersonationOption.Required)] in the method and
have IIS setup to only allow windows authentication (actually i have ananymous enabled still, but disabling makes no difference)
This impersonation works fine in the scenario where i have a netTCP Service on Machine A with a client with a basicHttp service on machine B with a clinet for the basicHttp service also on machine B ... however if i move that client to any machine C i get the following error:
The exception is '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 '00:10:00''
the inner message is 'An existing connection was forcibly closed by the remote host'
Am beginning to think this is more a network issue than config ... but then im grasping at straws ...
the config files are as follows (heading from the client down to the netTCP layer)
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="basicHttpBindingEndpoint" closeTimeout="00:02:00"
openTimeout="00:02:00" receiveTimeout="00:10:00" sendTimeout="00:02:00"
allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
useDefaultWebProxy="true">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Windows" proxyCredentialType="None"
realm="" />
<message clientCredentialType="UserName" algorithmSuite="Default" />
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://panrelease01/WCFTopWindowsTest/Service1.svc"
binding="basicHttpBinding" bindingConfiguration="basicHttpBindingEndpoint"
contract="ServiceReference1.IService1" name="basicHttpBindingEndpoint"
behaviorConfiguration="ImpersonationBehaviour" />
</client>
<behaviors>
<endpointBehaviors>
<behavior name="ImpersonationBehaviour">
<clientCredentials>
<windows allowedImpersonationLevel="Impersonation"/>
</clientCredentials>
</behavior>
</endpointBehaviors>
</behaviors>
</system.serviceModel>
</configuration>
the service for the client (basicHttp service and the client for the netTCP service)
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
<system.serviceModel>
<bindings>
<netTcpBinding>
<binding name="netTcpBindingEndpoint" closeTimeout="00:01:00"
openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions"
hostNameComparisonMode="StrongWildcard" listenBacklog="10" maxBufferPoolSize="524288"
maxBufferSize="65536" maxConnections="10" maxReceivedMessageSize="65536">
<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" protectionLevel="EncryptAndSign" />
<message clientCredentialType="Windows" />
</security>
</binding>
</netTcpBinding>
<basicHttpBinding>
<binding name="basicHttpWindows">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Windows"></transport>
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="net.tcp://5d2x23j.panint.com/netTCPwindows/Service1.svc"
binding="netTcpBinding"
bindingConfiguration="netTcpBindingEndpoint"
contract="ServiceReference1.IService1"
name="netTcpBindingEndpoint"
behaviorConfiguration="ImpersonationBehaviour">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
</client>
<behaviors>
<endpointBehaviors>
<behavior name="ImpersonationBehaviour">
<clientCredentials>
<windows allowedImpersonationLevel="Impersonation" allowNtlm="true"/>
</clientCredentials>
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="WCFTopWindowsTest.basicHttpWindowsBehaviour">
<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="true" />
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service name="WCFTopWindowsTest.Service1"
behaviorConfiguration="WCFTopWindowsTest.basicHttpWindowsBehaviour">
<endpoint address=""
binding="basicHttpBinding"
bindingConfiguration="basicHttpWindows"
name ="basicHttpBindingEndpoint"
contract ="WCFTopWindowsTest.IService1">
</endpoint>
</service>
</services>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
<directoryBrowse enabled="true" />
</system.webServer>
</configuration>
then finally the service for the netTCP layer
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.web>
<authentication mode="Windows"></authentication>
<authorization>
<allow roles="*"/>
</authorization>
<compilation debug="true" targetFramework="4.0" />
<identity impersonate="true" />
</system.web>
<system.serviceModel>
<bindings>
<netTcpBinding>
<binding name="netTCPwindows">
<security mode="Transport">
<transport clientCredentialType="Windows"></transport>
</security>
</binding>
</netTcpBinding>
</bindings>
<services>
<service behaviorConfiguration="netTCPwindows.netTCPwindowsBehaviour" name="netTCPwindows.Service1">
<endpoint address="" bindingConfiguration="netTCPwindows" binding="netTcpBinding" name="netTcpBindingEndpoint" contract="netTCPwindows.IService1">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<endpoint address="mextcp" binding="mexTcpBinding" contract="IMetadataExchange"/>
<host>
<baseAddresses>
<add baseAddress="net.tcp://localhost:8721/test2" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="netTCPwindows.netTCPwindowsBehaviour">
<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="false" />
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
<directoryBrowse enabled="true" />
</system.webServer>
</configuration>
