Import GNS3 VM into PVE: Start from VMWare ESXI image (ova / zip) Copy to a location on the Proxmox system (i.e. a network share or /root) cd to the directory the ova is in # Extract zip it came in unzip GNS3*.zip # Resulting file in my case was called `GNS3 VM.ova' (with a space in the name!) # Extract OVA (this is itself a zip) tar -xvf 'GNS3 VM.