Installation setup gateway and web server

[kris123]

You can install the gateway and a Web server on one computer, and install the remaining IBM Cognos BI reporting components on other computers. If you have a Web farm, you may want to install a gateway on each Web server. Using multipleWeb servers to manage incoming requests provides a better level of service.

If you install only the gateway component on the same computer as the Web server, your Web server manages the core Web services and does not process user requests. This separation of processing may be required if you have a firewall between the Web server and your Application Tier Components computers.

what is the solution...if user requests are not processed?
opening the firewall port between gateway and Application Tier?  If yes what are the port used?

Please can some help me understand the above...taken from IBM administration guide (page 33 or near)

[kommireddy]

When you install application tier components, dispatcher runs on that server on port configured in cognos configuration. By default it uses 9300, in some cases this port may be changed based on availability or other security reasons. So, if you have a firewall between web tier and application tier, firewall rules need to be adjusted to allow outbound communication from webtier to dispatcher port.

[kris123]

sorry...but I could not understand entirely. What if port 9300 is available. why there will be a problem  in processing user requests?

[RobsWalker68]

Hi,

The role of the gateway is not to process user requests.  Its role is to direct a user request to the dispatcher which in turn handles the request i.e. talk to content manager/report service etc and route the output back to the gateway.

If all components gateway/dispatcher are installed on one machine then that machine will handle user processing (dispatcher). If it is just a gateway then it won't and the user processing will be handled by the machine with the dispatcher installed.