Hi,
The port 5555 is only used as a communication between the Cell Manager and client to initiate sessions. As far as I know, the actual traffic will use a random port assignment.
So if you have port 5555 open you will be able to see the client and telnet to it. You can probably also run a 'Clients\Check Installation...' successfully, yes?
What you might need to do is to set the following parameters in omnirc on your CM and MA:
OB2PORTRANGESPEC=xMA-NET:18000-18025;xSM:20100-20199
# Default: no ranges specified (i.e. use any available port)
# This variable limits the range of port numbers that specific
# Data Protector processes use when assigning listen ports dynamically.
# This option is typically set on the Cell Manager system and/or the
# Media Agent system when components of the cell are located on both sides
# of a firewall.
# Note that the firewall needs to be configured separately.
# Refer to "Firewall Support" in HP OpenView Storage Data Protector
# Administrator's Guide or in online help for additional information.
You'll also need to set up firewall rules to reflect these port ranges.
I hope I've understood your problem correctly, and that this helps in some way...
Cheers,
Bob