I have setup ePO 5.0.1 with HDLP 9.3 at our network. if ePO is inside of firewall what port will Client need to use thru firewall?
DLPe uses the McAfee Agent to receive policies and send events. You do not have to open special ports for DLPe to communicate with ePO Server.
When installaing ePO you were presented with an option to specify ports that the McAfee Agent would use. Ensure that those ports are open.