If iFolder 2.x server was installed in Coexistent mode, access NetStorage using the primary IP address of the server and access iFolder using the secondary IP address (the one provided in the iFolder 2.x server IP address field during the iFolder configuration).
For example, to access the Admin Console:
https://<secondary_ifolder_ ip address>/iFolderServer/Admin
To access the iFolder page:
http://<secondary_ifolder_ ip address>/iFolder