the file named core will be in the current working directory of the iplanet process - or iplanetd process or whatever it is called. It may be several processes.
Assuming there is an iplanet user account
Code:
awk -F: '/iplanet/{print $6}' /etc/passwd | read homedir
find $homedir -name core -user iplanet
is what I would start with.
to get a core file
Code:
ps -ef | grep iplanet
will give you the pid of the process
will force the image to dump core