    # File lib/fog/libvirt/models/compute/server.rb, line 147
            def ssh_proxy
              # if this is a direct connection, we don't need a proxy to be set.
              return nil unless connection.uri.ssh_enabled?
              user_string= service.uri.user ? "-l #{service.uri.user}" : ""
              Net::SSH::Proxy::Command.new("ssh #{user_string} #{service.uri.host} nc %h %p")
            end