Fixup SSH port forwarding

- Split from talesins/veewee pull request, commit: d76dac4ab6a8663, associated with issue #578 (GitHub) on jedi4ever/veewee
Adding the natting in the export phase causes an error, so don't do this.
Merge pull request #628 from bdellegrazie/windows-port-forwarding-fix

Windows port forwarding fix