Oaracle Application Server in DMZ configuration

We currently have external customers accessing our E1 JAS instances from the internet. Our setup has OAS Server A in a DMZ configuration passing traffic to OAS Server B, using the AJP protocol, which is behind the firewall on the internal network side.  OAS Server B then talks with the DB and Enterprise servers.  Per the documentation we have modified the mod_oc4j file to reference server B that sits insde the ineternal network.  We have a need to have new customers do the same but the E1 system they will be accessing is a completely separate JDE 9 install. Are we able