HP Storage Mirroring Software - Manual (Page 209)

Workload protection Page 208 of 677
Microsoft Windows ports
Full-server workload protection uses WMI (Windows Management Instrumentation)
which uses RPC (Remote Procedure Call). By default, RPC will use ports at random
above 1024, and these ports must be open on your firewall. RPC ports can be
configured to a specific range by specific registry changes and a reboot. See the
Microsoft Knowledge Base article 154596 for instructions.
Full-server workload protections also rely on other Microsoft Windows ports.
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Microsoft File Share uses ports 135 through 139 for TCP and UDP
communications.
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Microsoft Directory uses port 445 for TCP and UDP communications.
These ports must be open on your firewall. Check your Microsoft documentation if you
need to modify these ports.