One must have the Lotus Notes client running on the Lotus Notes connector node; this is a requirement of the connector. Often one would use the same client that is being used to access Lotus clients by the user base. There is a Lotus Notes client available from IBM for the Linux platform, but it requires a GUI. One can set up a standalone Linux connector node, on which a GUI could be installed. Alternately, one could set up a stand-alone Windows node to run the Lotus Notes client.