After successful testing of the @hellbondz's method, I found that my second network interface in the DSM is inaccessible from my LAN (I use multi-homed network). This was happened because:    Without this script PVE will add both netdev into default bridge - vmbr0 (a public bridge in my case).   I patched two PVE scripts to be able add network interface with Proxmox GUI and staying out from edit config manually (what somebody can't do it correctly).   So my m
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