pfSense can do natreflection to make your forwarded services available by their public IP for the internal clients. Just enable it at system>advanced (very bottom of the page). Other option is to setup a split dns (resolving the internal IP of your server for the clients). This has to be done at the DNS-Server that your client use. In case it'S the DNS-forwarder of the pfsense visit services>dns-forwarder and add static mappings to make it resolve the internal IP for your servers.
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