Found these docs on the oracle support web: How to Configure DG4ODBC on Linux x86 32bit or on HP-UX RISC (DG4ODBC 11.1 only) to Connect to Non-Oracle Databases post install (Doc ID 466228.1) Problems Configuring Database Gateway For ODBC (DG4ODBC) to Connect To Postgres (Doc ID 881667.1)