Because most firewalls do not allow a remote system to be displayed in the Microsoft Windows Network tree, you may need to take additional steps to select these remote systems in the Backup Exec administration console.
To browse systems through a firewall
On the Properties pane, under Job Defaults, click Network and Security.
Verify that a dynamic range of ports has been set for the media server and remote agent and that the firewall is configured to pass these port ranges and the 10,000 port (which is used for the initial connection from the media server to the Remote Agent).
Port 6101 must be open to browse Windows systems in the backup selections tree.