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Sophos Home Virtual Appliance - PCIE Passthrough Best Practices

I would like to run Sophos Home on either my XCG-NG or Proxmox host.   In each of those hosts I have 4 port SFP+ Silicom cards (which are just rebranded X520 cards with two chipsets).

I would prefer to pass the whole pcie device into the Sophos Home host, but this does not seem to work in either environment.   I have PCIE passthrough set up correctly in both virtualization hosts, and am to pass the cards just fine to other OSes (debian, opnsense, etc).

When i try to pass them into the Sophos Home, the interfaces either just dont show up at all, or wont pull a WAN ip.     

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[edited by: Erick Jan at 12:17 AM (GMT -7) on 25 Apr 2024]