When you install Maximo (IBM Control Desk in this case) on IBM HTTP Server and WebSphere, the installation creates all of the virtual hosts you need based on the hostname of the IBM HTTP Server(s) that you include in your environment. However, you may need users to access the application using a different hostname (maybe one that's accessible from the Internet, for example). If you simply add a DNS CNAME record for your web server, you'll get an error when you try to access the application with that hostname.
To fix this problem, you need to add a Host Alias to each of the appropriate Virtual Hosts that you have defined for Maximo, then restart the application server(s). Here's how:
1. In my environment, I want to be able to access Maximo using the URL:
The two servers participating in my cluster are named icd1 and icd2. I'm adding an entry in my /etc/hosts (or \windows\system32\drivers\etc\hosts) file for icdcommon to be an alias for icd1.
(In a real environment, you would be modifying DNS appropriately).
2. Log into the WebSphere admin console at http://dmgr_host:9060/admin
3. Navigate to Environment->Virtual Hosts, where you will see multiple virtual hosts. I have the application configured in a cluster named MXCLUSTER, so the virtual hosts of interest to me are:
4. For each of the above Virtual Hosts, click on that host then click the Host aliases link.
5. Click the New button to add a new entry and in that entry, specify:
Host Name: icdcommon
6. Click OK, then click the save link at the top of the page (or you can wait until your done to click save).
7. Once you've done the above for each of the three Virtual Hosts, you need to restart all IBM HTTP Servers AND all application servers.
8. Now you should be able to access the application with http://icdcommon/maximo (you may need to restart your browser).