The Java client requires the following so that it can communicate with the Web server using a secure connection:
You manage both certificates for the Java client using the SAP NetWeaver Administrator.
Configuring Authentication on the TREX Web Server
When you provide the certificates for the TREX Web server, you enter the owner and issuer of the client certificate into the configuration file TREXcert.ini (Windows/IIS) or httpd.conf (UNIX/Apache Web Server) so that the Java client can authenticate itself with the Web server. You do this after providing the certificates for the TREX Java client.