i need help with firewall ports that needs to be opened for this upgrade to work.

According to post https://community.emc.com/thread/186320

DPA Agent --> DPA Application Server:9002

DPA Application Server --> DPA Agent:3741

The other requirement is for the DPA Application server to communicate with the Datastore (database):

DPA Application Server --> DPA Datastore:9003

My understanding is that DPA agents are installed on clients like avamar severs (which are clients to this DPA server). User guide does not have any info on how to upgrade DPA agents on them.

Your help will be very much appreciated.