Hi,
We are currently in development cycle for ESS/MSS based on portal EP 6.0 SP16 and ERP 2004 in backend. We are trying to find out how the ESS/MSS business package on portal works with backend ESS functionality in ERP 2004. It is more of a connectivity question. We want to know if we expose our portal to internet so that users can login to ESS/MSS from internet, do we need to put backend ERP (ECC 5.0) system also in DMZ? Do we need to open ports between portal and R/3 so that ESS/MSS can work? Or the communication happens using JCO connections and we need not to expose R/3 system.
Also one more specific question? If someone knows how ESS/MSS talks to backend system. At SAP application layer level or database level? I am asking this question to check if I need to open a port to talk to database or I can very well keep 2-3 SAP application server in DMZ and work.
PK