OLE DB, OleDbConnection (.NET) from Microsoft 
 
TCP/IP 
  
Provider=DB2OLEDB;Network Transport Library=TCPIP;Network Address=XXX.XXX.XXX.XXX;Initial Catalog=MyCtlg;Package Collection=MyPkgCol;Default Schema=Schema;User ID=myUsername;Password=myPassword; 
 
 
APPC 
  
Provider=DB2OLEDB;APPC Local LU Alias=MyAlias;APPC Remote LU Alias=MyRemote;Initial Catalog=MyCtlg;Package Collection=MyPkgCol;Default Schema=Schema;User ID=myUsername;Password=myPassword; 
 
IBM's OLE DB Provider (shipped with IBM DB2 UDB v7 or above) 
 
TCP/IP 
  
Provider=IBMDADB2;Database=myDataBase;Hostname=myServerAddress;Protocol=TCPIP;Port=50000; Uid=myUsername;Pwd=myPassword; 
 
ODBC 
 
Standard 
  
Driver={IBM DB2 ODBC DRIVER};Database=myDataBase;Hostname=myServerAddress;Port=1234;Protocol=TCPIP;Uid=myUsername;Pwd=myPassword;