Gateway

    IBM Cognos have below listed gateways-

• CGI-  It is default gateway. CGI can be used for all supported Web servers. To enhance performance or throughput, we may choose other supported gateway types.

• ISAPI-  ISAPI can be used for the Microsoft Internet Information Services (IIS) Web server.  It delivers faster performance for IIS.

• apache_mod- We can use an apache_mod gateway with the Apache Web server.

• servlet- If Our Web server infrastructure supports servlets or we are using an application server, We can use a servlet gateway.

When an IBM Cognos BI gateway receives a request, it perform below tasks-

• It encrypts passwords to ensure security and did not allow unauthorized user to access.
• It extracts information needed to submit the request to an IBM Cognos BI server.
• It attaches environment variables for the Web server.
• It adds a default namespace to the request to ensure that the server authenticates the user in the correct namespace.
• It passes requests to an IBM Cognos BI dispatcher for processing.