Hi,
The easiest way to achieve that in both web server is create a page called index.html in your web server root folder with code bellow:
<html>
<head>
<meta http-equiv="refresh" content="0; URL='/ibmcognos'" />
</head>
</html>
------------------------------
JEAM COELHO
Cognos Solution Architect
Linkedin:
https://www.linkedin.com/in/jeamcoelho/------------------------------