Solution : https://service.sap.com/sap/support/notes/808347 (SAP Service marketplace login required)
Key words : 
download catalog > sap netweaver > sap netweaver > sap netweaver 04 > entry, downloads > sap support packages > browse, default_host > sap > bc > gui > sap >, <port> /sap/public/ping               http, sap > bc > gui > sap >, default_host > sap > public > bc >, <port> /sap/bc/echo, general icf/icm functionality, sap netweaver 04 reason, sap web application server 6
Related Notes : 
       
| 920432 | Enable WebGUI for Service Desk | 
| 816973 | ITS 7.00 - preclarification and basic problem analysis | 
| 709038 | SAP Integrated ITS | 
| 634006 | Note on the preclarification of ICM messages | 
| 592085 | Installing HTTP Connect service | 
| 508140 | Customer messages - Customer logon data | 
| 31515 | Service connections |