I think that you need to figure out why this is failing:
telnet fails on port 5555
Actually, if this was the problem, not even file system backups would be running. Does the
telnet CM_hostname
also fail?
You didn't specify what the OS-type of the Oracle server is, but, I think that it would be a good idea to check the configuration file
HPUX:
/etc/inted.conf
Check the last couple of lines to see if there is an entry for 'omni'
/etc/services
Check the last couple of lines to see if there is an entry for 'omni
Linux
/etc/xinetd.d
Look for a file named 'omni'
/etc/services
Check the last couple of lines to see if there is an entry for 'omni
While you are in the Services file, check to be sure that no other application is using the port 5555
go to Services, and be sure that there is a 'telnet' service running
Being in a DMZ should not prevent you from doing a connection to TCP using port 5555, it will just keep any data from being transferred