HP Storage Mirroring Software - Manual (Page 301)

Workload protection Page 300 of 677
Microsoft Windows ports
Virtual 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.
Virtual 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.