In order to activate the (old) Discoverer you have to do the following:
1. enabled
Has to be ”enabled”
2. s_appserverid_authentication="OFF"
Has to be set to OFF otherwise you will not get any connections.....
There is a long explanation to this as well, and you can get it working with ON and PARTIAL ....
Anyhow....This is the most error you’ll see from this problem:
”This Applications Server is not authorized to access this database”
and to verify you’ll do a ”select lower(host_name) || '_' || lower(instance_name) from v$instance; ” which will be ok....

Then you can access the fullblown Discoverer on http://name:port/discwb4/html/discolaunch.htm
(Will not work on Mac’s, Sun boxes and Linux boxes.... for that you will have to use:
http://name:port/discwb4/html/whatever_language_you may_choose/netscape/start_sol.htm
And for Discoverer Viewer(the runtime version only)
http://name:port/discoverer4i/viewer/

PS: Please Note: There will be an issue when/if the users will have to access this via VPN.....
requires some tweaking within the actual scripts in the Discoverer directory.....

Mærker: oracle discoverer