EPiServer cache invalidation over net.tcp

I was recently struggling to get cache invalidation to work in EPiServer over net.tcp instead of UDP, which is default in EPiServer. There are a couple of good blog posts out there (for example http://blog.fredrikhaglund.se/blog/2009/09/22/episerver-cms-how-to-configure-remote-events-with-many-servers-and-firewalls-between-them/), and this post aims to clarify some aspects. I'm using EPiServer CMS 6 R2 on Windows Server 2008 R2 / IIS 7.5

First of all I want to configure the use of port sharing. This config should be applyed to all three web.configs:

<!-- In all three web.configs  -->
<system.serviceModel>   
    <bindings>
      <netTcpBinding>
        <binding name="RemoteEventsBinding"
                 portSharingEnabled="true">
          <security mode="None" />
        </binding>
      </netTcpBinding>
    </bindings>

Then I want to configure the site used by the editors ie. the site that should publish events of updates to the other server:

<!-- web.config of the publisher site  -->
<system.serviceModel>
    <client>
      <endpoint name="WEBFRONT1"
                contract="EPiServer.Events.ServiceModel.IEventReplication"
                bindingConfiguration="RemoteEventsBinding"
                address="net.tcp://[SERVER1]/RemoteEventService1"
                binding="netTcpBinding" />

      <endpoint name="WEBFRONT2"
                contract="EPiServer.Events.ServiceModel.IEventReplication"
                bindingConfiguration="RemoteEventsBinding"
                address="net.tcp://[SERVER2]/RemoteEventService2"
                binding="netTcpBinding" />
    </client> 

The other two servers do not need any client configuration for the cache invalidation to work. They however needs some endpoints:

<!-- web.config of WEBFRONT1 (subscriber)  -->
<services>
      <service name="[EPiServerSiteIdWebFront1]/EPiServer.Events.Remote.EventReplication"
               behaviorConfiguration="DebugServiceBehaviour">
        <endpoint name="RemoteEventServiceEndPoint"
                  contract="EPiServer.Events.ServiceModel.IEventReplication"
                  bindingConfiguration="RemoteEventsBinding"
                  address="net.tcp://localhost/RemoteEventService1"
                  binding="netTcpBinding" />
      </service>

and:

<!-- web.config of WEBFRONT2 (subscriber)  -->
<services>
      <service name="[EPiServerSiteIdWebFront2]/EPiServer.Events.Remote.EventReplication"
               behaviorConfiguration="DebugServiceBehaviour">
        <endpoint name="RemoteEventServiceEndPoint"
                  contract="EPiServer.Events.ServiceModel.IEventReplication"
                  bindingConfiguration="RemoteEventsBinding"
                  address="net.tcp://localhost/RemoteEventService2"
                  binding="netTcpBinding" />
      </service>

[UPDATE: THIS IIS SECTION IS NOT NEEDED!]
And that's the only web.config needed! You do need to set two settings in the IIS of the to subscriber sites:
Site > Bindings...


Right-click the site in IIS > Manage Web Site > Advanced Settings...


[END UPDATE]