TAP Network help with QEMU 6.0.0 Win64

[Brendan Simon (eTRIX)]

    I've just installed the Win64 build of QEMU
      6.0.0.  I converted a virtualbox Debian image and can get it to
      run in QEMU :)  but I can't get the tap networking going :(
      
      I have installed OpenVPN client and added Virtual Network
      adapters.  I can see them being connected/not connected when qemu
      starts, but I can't get any comms (ping/ssh) between Windows Host
      <-> Linux Guest.
      
          -netdev tap,id=mynet0,ifname=Ethernet_QEMU_Tap_1 -device
      e1000,netdev=mynet0,mac=52:54:98:76:54:01
          -netdev tap,id=mynet1,ifname=Ethernet_QEMU_Tap_2 -device
      e1000,netdev=mynet1,mac=52:54:98:76:54:02
      
      I have my WiFi adapter setup for Internet Sharing and I selected
      Ethernet_QEMU_Tap_1 device to share it.
      I can't get a DHCP address for that interface (`ens3` - which I
      verified with ifconfig and the mac address).
      
      In Linux I can see the Ethernet_QEMU_Tap_2 device.  It is
      configured with NetworkManager and the device shows up as `ens4`
      (I can tell by the mac address that shows up in ifconfig).
      It has an IP address and the routes look ok.
      However I can not ping the virtual network adapter in windows land
      (192.168.123.2).
      ifconfig status show Tx and Rx packets increasing and no errors
      reported.  Packets are getting lost somewhere.
      
      How do I get this working?  Is it a Windows firewall thing or some
      other config?
      
      I'm trying to replicate my VirtualBox setup.  First ethernet being
      NAT to get Internet access.  Second ethernet being Host-Only with
      static IP so I can ssh to it from the Windows host.
      
      Thanks, Brendan.