When you go to restore a VM using Veeam Backup 4.x.x you may get the following error.
Failed to validate command “OpenPortIn for firewall port xxxx”
The resolution is simple and as follows.
Under the ESX Host properties you are trying to restore to, enable “Elevate to Root” and “Add account to sudoers file automatically”
Once you have completed this step you should be good to go.