Event Syncronization for Multi site setup

I have two epi instances setup locally, pointing to same source. One is for Authoring and other is Presentation .I am trying to setup event synchronization between the two.

So the idea is, when content is updated at authoring site, at the presentation site cache is cleared without any waitime or lag. Episerver Version 9.12.

Below is TCP configuration:

Web.config for Authoring hosting two sites (local.auth.com & local.auth2.com. Both running locally)

          name="Site1"
          address="net.tcp://local.pres.com:13555/RemoteEventService"
          bindingConfiguration="RemoteEventsBinding"
          contract="EPiServer.Events.ServiceModel.IEventReplication"
          binding="netTcpBinding" />

          name="Site2"
          address="net.tcp://local.pres2.com:13556/RemoteEventService"
          bindingConfiguration="RemoteEventsBinding"
          contract="EPiServer.Events.ServiceModel.IEventReplication"
          binding="netTcpBinding" />

Web.config for Presentation site hosting two sites (local.pres.com & local.pres2.com. Both running locally).

                    contract="EPiServer.Events.ServiceModel.IEventReplication"
                    binding="netTcpBinding" address="net.tcp://local.auth.com:13555/RemoteEventService" bindingConfiguration="RemoteEventsBinding" />




                    contract="EPiServer.Events.ServiceModel.IEventReplication"
                    binding="netTcpBinding" address="net.tcp://local.auth2.com:13556/RemoteEventService" bindingConfiguration="RemoteEventsBinding" />

I am trying to setup event synchronization between following:

local.auth.com & local.pres.com

Local.auth2.com & local.pres2.com

What am i doing wrong?