We have WAS 5.1 / IHS 1.3.x on AIX 5.1 and SSL has been configured between WAS and IHS.
The application seems to work fine with the http requests, but when https requests are sent the IHS doesnt seem to find the resources which are beneath the WEB-INF. In our case it is not able to find the servlets. It tries to look for the servlet mapping name and says it cant find it.
We have a servlet called XXXController.java and it is mapped in web.xml as /controller
However the IHS error_log has an error that it can find the file controller.
To test if the SSL was working properly we placed a sample html file in the root of the web application (outside WEB-INF) and we tried to access via https and it shows up.